Lataa apic-gui 0.4.0

A large release: a simplified, breaking contract format plus full redesigns of both the TUI and the desktop GUI editors around it.
Changed
- Contract format (breaking). The request URL is now a single free-form string ("url": "https://api.example.com/v1/users/{id}") with inline {name} path tokens, replacing the old structured URL object. Query parameters are { name, value, description, required }, both query parameters and headers gain a required flag, and each response can carry its own headers. A request body is the raw JSON payload written directly under request, and a response body is written under the response's schema key. The old type/schema field-level model and the { "example": ... } body wrapper are gone.
- User-facing messages use commas instead of semicolons and em-dashes.
- TUI editing, redesigned. The endpoint header is one inline-editable METHOD url line; the method is chosen from a picker popup instead of cycling. QUERY and HEADERS are NAME/VALUE(/DESCRIPTION) tables. RESPONSE is a code - title tab strip: a opens a Status / Short Description form and then the JSON editor, e edits a tab's status/title (or opens the editor on its body), and d removes a response. The JSON editor saves with Ctrl-S, cancels with Esc, and pretty-prints with Ctrl-P; saving an empty body removes its response.
- Desktop GUI, redesigned. A single tabbed editor (Overview, Headers, Query, Request, Response) with a line-numbered JSON editor, metadata tables carrying a Required/Optional chip, editable response-code tabs, frameless inline inputs, and a calmer green theme.

Added
- The HTTP method is selected from a dropdown in the GUI (and a picker popup in the TUI) listing all methods, rather than cycling one click at a time.
- A required flag on request headers and query parameters, surfaced across the CLI/TUI/GUI, the Postman converter, and the project template.
- Response-level headers, editable in both the TUI and the GUI.
- apic convert --postman gains a --force flag to overwrite contracts thatalready exist. The default still refuses (erroring on an existing file), and the error now points to --force.
- Refreshed bundled example/ project (authentication/ and profile/ sets).

Removed
- The structured body schema, type, field schema, typed fields, properties, file/accept parts, and object[] array bodies, along with the structured URL object. Request and response bodies are now raw JSON payloads (the request written directly under request, a response under schema).
- apic read --example (bodies are already example-only) and the TUI schema generate/infer keys, which no longer have a schema to operate on.

Fixed
- GUI: the sidebar method badge now refreshes when a contract is saved.
- GUI: warn when installing a per-user launcher entry would duplicate an existing system-wide apic entry.
- TUI: numerous editing-correctness fixes (method focus on the url line, modal key handling after close, selected response-tab text color, empty-row cleanup).
- Windows: statically link the MSVC CRT so binaries run without VCRedist, and install apic-gui.exe at the MSI root so winget resolves the executable.