feat: add C++ bindings generation support and update related configur…

[GordonSmith]

…ations

[Copilot]

Pull request overview

This PR adds C++ bindings generation support to the VS Code WIT extension, enabling users to generate C++ language bindings from WIT (WebAssembly Interface Types) files. The implementation follows the existing pattern used for other supported languages (Rust, C, C#, Go, MoonBit).

Key Changes:

• Adds wit-bindgen-cpp dependency and implements C++ binding generation logic
• Registers new VS Code command wit-idl.generateBindingsCpp with appropriate UI integration
• Updates documentation to reflect C++ support alongside existing languages

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
wit-bindgen-wasm/src/lib.rs	Implements C++ bindings generation functions following existing language patterns, adds "cpp" and "c++" language matching
wit-bindgen-wasm/README.md	Documents C++ as a supported language option in the API documentation
wit-bindgen-wasm/Cargo.toml	Adds wit-bindgen-cpp 0.49 dependency
wit-bindgen-wasm/Cargo.lock	Updates lock file with wit-bindgen-cpp and its transitive dependencies
src/extension.ts	Registers the generateBindingsCpp command and adds it to subscriptions
package.json	Adds command definition, command palette entry, and editor context menu item for C++ bindings
.vscode/settings.json	Adds unrelated IDE configuration (ecl.launchConfiguration)