Fast Node Manager: download ældre versioner

Performance & UX Improvements:
- Shell startup is now faster: fnm env --use-on-cd applies the initial version during fnm env itself, eliminating an extra fnm use subprocess
- Improved --use-on-cd shell hook robustness (zsh hook deduplication on re-source, Windows CMD fixes for paths with spaces and drive changes)
New Features:
- fnm install --use flag to automatically switch to the version after installing
- fnm default (with no arguments) now returns the current default version
Internal:
- Rust toolchain upgraded to 1.88
Docs/Maintenance:
- Various README improvements, typo fixes, and CI workflow fixes
Thanks to the new contributors: @SunsetTechuila, @MangelMaxime, @CodingWithAnxiety, @zeroberry, @isaacl :hat-tip:

Patch Changes
- #1326 172fb0a Thanks @Schniz! - fix --use-on-cd failing with newly released default of --resolve-engines when engines key didn't exist

Minor Changes
- #1265 186e4bb Thanks @Schniz! - enable --resolve-engines by default. out of experimental phase.
to disable it, add a --resolve-engines=false flag, and make sure to open an issue describing why. It might feel like a breaking change but .nvmrc and .node-version have precedence so it should not.
I am all in favor of better experience and I believe supporting engines.node is a good direction.
Patch Changes
- #1310 9273981 Thanks @Schniz! - make github releases of macos to be a universal macos executable (both m1 and x64) as github changed the workers to be m1
- #1277 12cf977 Thanks @deanshub! - Having install and uninstall aliases
- #1318 65f7a22 Thanks @Schniz! - better error handling for malformed json

Patch Changes
- #1264 364d2a9 Thanks @Schniz! - fix: allow to type powershell and power-shell as shell type inputs
- #1195 74d7c33 Thanks @mattmess1221! - When downloading from node-dist, Fallback to .tar.gz download when the .tar.xz download fails
- #1259 1000914 Thanks @skirsten! - Fix --resolve-engines in combination with --use-on-cd
- #1248 e03d345 Thanks @bburns! - docs: add link for windows terminal startup script configuration
- #1184 fefdf69 Thanks @julescubtree! - fix panic when list-remote --filter --latest has no results
- #1255 71c1c9a Thanks @stefanboca! - set aliases during install, even if corepack is enabled
- #1204 19bffe5 Thanks @JLarky! - Document how to use nightly builds
- #1218 345adaf Thanks @Schniz! - internal: retry download in case of error in test proxy
- #1226 8e2d37d Thanks @mo8it! - performance optimizations, especially for fnm env
- #1223 2b211ef Thanks @mo8it! - Allow reading non-unicode paths from environment variables

Patch Changes
- #1164 318f86d Thanks @Schniz! - windows: fix shell inference in powershell when using scoop's shims

- #1143 f76a001 Thanks @Schniz! - use XDG conventions in MacOS directories by default. Thank you @utkarshgupta137 for the initial work 🙏
Patch Changes
- #1148 0b530cc Thanks @Schniz! - fix ordering in ls-remote
- #1133 a1afe84 Thanks @Schniz! - upgrade all dependencies & maintain lockfile