Require Biome project opt-in for built-in LSP

[cosmosjeon]

Summary

• Gate the built-in Biome LSP server behind project opt-in when resolving by file path.
• Treat biome.json, biome.jsonc, or a package.json dependency on @biomejs/biome as opt-in.
• Preserve explicit project/user LSP config behavior and existing pathless resolver behavior.
• Pass file or directory paths from diagnostics call sites so the resolver can avoid starting Biome in unrelated workspaces.

Validation

• npx vitest --run test/server-resolution.test.ts
• npm test
• npm run check
• Manual MCP CLI QA: no-config /tmp/.../style.css returned No LSP server configured for extension: .css, with no @biomejs/biome or biome lsp process before/after.
• Manual MCP CLI QA: biome.json fixture returned No diagnostics found, and no Biome process remained after cleanup.

Notes

• Tag: lazycodex-generated
• This fixes the source MCP package LazyCodex vendors for its LSP integration.

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Summary by cubic

Require explicit Biome project opt-in for the built-in LSP when resolving by file or directory paths. Prevents starting Biome in unrelated workspaces; pathless resolution and explicit project/user LSP config remain unchanged.

• Bug Fixes
  • Gate built-in Biome on biome.json, biome.jsonc, or @biomejs/biome in package.json (any dependency field).
  • Pass file/dir paths to the resolver and filter available servers so Biome is excluded unless opted in.
  • Add tests covering no-opt-in, biome.json/biome.jsonc, and @biomejs/biome dependency cases.

^{Written for commit f3b0dc7. Summary will update on new commits.}