xled: matoleo yote na matoleo ya zamani

**Full Changelog**：https://github.com/excelano/xled/compare/v0.13.0...v0.13.1

Behaviour changes
- Blank lines are rows. A blank line in the input is now a row with no fields, so row numbers match the file's lines (as --no-header always promised). On a file with blank lines, a script that addresses rows by number can select different rows than in 0.12.
- -i preserves the file. Rows a script does not change are written back byte for byte: line endings (LF, CRLF, CR), quoting, blank lines, the UTF-8 BOM and a missing final newline all survive. Previously every row was re-encoded (#27).
- round() edge cases: a value that rounds to zero is 0, not -0, and values too large for the requested decimals are no longer altered by float error.
- append is refused as out of scope, with the upstream route named.
New
- --diff prints one line per changed cell (C5 [price]: "$1,200" → "1200"). On its own it previews; with -i it records what was written. The REPL's preview uses it too.
- fixed(x, [decimals], [no_commas]), Excel's FIXED, for numbers as text with set decimals: fixed([amt], 2, true) gives 1234.50.
- Warnings when row 1 looks like a title above the real header, and when the file looks like it uses another delimiter (-d ';').
- Corrections that name the fix: header 1 → 1 header; [Name] → did you mean [name]; a bare header name → its bracketed form.
Fixes
- The skill and docs gave header N; the command is N header (#26).

Install xled 0.12.2
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/excelano/xled/releases/download/v0.12.2/xled-installer.sh | sh
Install prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://github.com/excelano/xled/releases/download/v0.12.2/xled-installer.ps1 | iex"
Install prebuilt binaries via Homebrew
brew install excelano/tap/xled
Download xled 0.12.2
──────────────────────────────────────────┬───────────────────┬─────────────
File │Platform │Checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-apple-darwin.tar.xz │Apple Silicon macOS│checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-apple-darwin.tar.xz │Intel macOS │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-pc-windows-msvc.zip │x64 Windows │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-unknown-linux-gnu.tar.xz │ARM64 Linux │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-unknown-linux-gnu.tar.xz │x64 Linux │checksum
──────────────────────────────────────────┴───────────────────┴─────────────

## Install xled 0.12.1

### Install prebuilt binaries via shell script

```sh
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/excelano/xled/releases/download/v0.12.1/xled-installer.sh | sh
```

### Install prebuilt binaries via powershell script

```sh
powershell -ExecutionPolicy Bypass -c "irm https://github.com/excelano/xled/releases/download/v0.12.1/xled-installer.ps1 | iex"
```

### Install prebuilt binaries via Homebrew

```sh
brew install excelano/tap/xled
```

## Download xled 0.12.1

| File | Platform | Checksum |
|--------|----------|----------|
| [xled-aarch64-apple-darwin.tar.xz](https://github.com/excelano/xled/releases/download/v0.12.1/xled-aarch64-apple-darwin.tar.xz) | Apple Silicon macOS | [checksum](https://github.com/excelano/xled/releases/download/v0.12.1/xled-aarch64-apple-darwin.tar.xz.sha256) |
| [xled-x86_64-apple-darwin.tar.xz](https://github.com/excelano/xled/releases/download/v0.12.1/xled-x86_64-apple-darwin.tar.xz) | Intel macOS | [checksum](https://github.com/excelano/xled/releases/download/v0.12.1/xled-x86_64-apple-darwin.tar.xz.sha256) |
| [xled-x86_64-pc-windows-msvc.zip](https://github.com/excelano/xled/releases/download/v0.12.1/xled-x86_64-pc-windows-msvc.zip) | x64 Windows | [checksum](https://github.com/excelano/xled/releases/download/v0.12.1/xled-x86_64-pc-windows-msvc.zip.sha256) |
| [xled-aarch64-unknown-linux-gnu.tar.xz](https://github.com/excelano/xled/releases/download/v0.12.1/xled-aarch64-unknown-linux-gnu.tar.xz) | ARM64 Linux | [checksum](https://github.com/excelano/xled/releases/download/v0.12.1/xled-aarch64-unknown-linux-gnu.tar.xz.sha256) |
| [xled-x86_64-unknown-linux-gnu.tar.xz](https://github.com/excelano/xled/releases/download/v0.12.1/xled-x86_64-unknown-linux-gnu.tar.xz) | x64 Linux | [checksum](https://github.com/excelano/xled/releases/download/v0.12.1/xled-x86_64-unknown-linux-gnu.tar.xz.sha256) |

Install xled 0.11.0
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/excelano/xled/releases/download/v0.11.0/xled-installer.sh | sh
Install prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://github.com/excelano/xled/releases/download/v0.11.0/xled-installer.ps1 | iex"
Install prebuilt binaries via Homebrew
brew install excelano/tap/xled
Download xled 0.11.0
──────────────────────────────────────────┬───────────────────┬─────────────
File │Platform │Checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-apple-darwin.tar.xz │Apple Silicon macOS│checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-apple-darwin.tar.xz │Intel macOS │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-pc-windows-msvc.zip │x64 Windows │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-unknown-linux-gnu.tar.xz │ARM64 Linux │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-unknown-linux-gnu.tar.xz │x64 Linux │checksum
──────────────────────────────────────────┴───────────────────┴─────────────

Install xled 0.8.0
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/excelano/xled/releases/download/v0.8.0/xled-installer.sh | sh
Install prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://github.com/excelano/xled/releases/download/v0.8.0/xled-installer.ps1 | iex"
Install prebuilt binaries via Homebrew
brew install excelano/tap/xled
Download xled 0.8.0
──────────────────────────────────────────┬───────────────────┬─────────────
File │Platform │Checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-apple-darwin.tar.xz │Apple Silicon macOS│checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-apple-darwin.tar.xz │Intel macOS │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-pc-windows-msvc.zip │x64 Windows │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-unknown-linux-gnu.tar.xz │ARM64 Linux │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-unknown-linux-gnu.tar.xz │x64 Linux │checksum
──────────────────────────────────────────┴───────────────────┴─────────────

Install xled 0.7.0
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/excelano/xled/releases/download/v0.7.0/xled-installer.sh | sh
Install prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://github.com/excelano/xled/releases/download/v0.7.0/xled-installer.ps1 | iex"
Install prebuilt binaries via Homebrew
brew install excelano/tap/xled
Download xled 0.7.0
──────────────────────────────────────────┬───────────────────┬─────────────
File │Platform │Checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-apple-darwin.tar.xz │Apple Silicon macOS│checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-apple-darwin.tar.xz │Intel macOS │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-pc-windows-msvc.zip │x64 Windows │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-unknown-linux-gnu.tar.xz │ARM64 Linux │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-unknown-linux-gnu.tar.xz │x64 Linux │checksum
──────────────────────────────────────────┴───────────────────┴─────────────

Install xled 0.6.0
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/excelano/xled/releases/download/v0.6.0/xled-installer.sh | sh
Install prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://github.com/excelano/xled/releases/download/v0.6.0/xled-installer.ps1 | iex"
Install prebuilt binaries via Homebrew
brew install excelano/tap/xled
Download xled 0.6.0
──────────────────────────────────────────┬───────────────────┬─────────────
File │Platform │Checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-apple-darwin.tar.xz │Apple Silicon macOS│checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-apple-darwin.tar.xz │Intel macOS │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-pc-windows-msvc.zip │x64 Windows │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-aarch64-unknown-linux-gnu.tar.xz │ARM64 Linux │checksum
──────────────────────────────────────────┼───────────────────┼─────────────
xled-x86_64-unknown-linux-gnu.tar.xz │x64 Linux │checksum
──────────────────────────────────────────┴───────────────────┴─────────────