Add Glide extension

[Murilinho145SG]

Adds language support for Glide, a systems language that compiles to C.

The extension provides:

• Language server integration via glide lsp (diagnostics, hover, completion, signature help, go-to-definition, references, rename, document/workspace symbols, semantic tokens, inlay hints, code actions, formatting, call/type hierarchy).
• Tree-sitter highlighting, indents, and outline (grammar pinned from the Glide repo).
• A /glide-routes slash command listing @route'd handlers in a file.

Extension source: https://github.com/glide-lang/zed-glide

The extension resolves the glide binary from the worktree PATH / ~/.glide/bin; it does not download the compiler. Validated locally with cargo check --target wasm32-wasip1.

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[Murilinho145SG]

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