Add Cmd+Click navigation for tsconfig lib entries

[unrevised6419]

Description

Adds document links for entries in compilerOptions.lib[] inside tsconfig.json / jsconfig.json, so that Cmd+Click on a value like "DOM" or "ES2020" opens the corresponding lib.<name>.d.ts file. This mirrors the existing behavior for extends, files, and references.

The target lib file is resolved from the same TypeScript version the language service is currently using:

1. The active version (honors typescript.tsdk and the "Use Workspace Version" picker selection — reads the same typescript.useWorkspaceTsdk workspace state the version manager writes).
2. Any other locally available TypeScript install (workspace node_modules/typescript, configured tsdk).
3. The bundled TypeScript shipped with VS Code.

Implementation reuses the existing _typescript.openExtendsLink command and TsConfigLinkType enum (new Lib variant) rather than introducing a parallel command + args type.

How to test

1. Open a tsconfig.json containing:

   {
     "compilerOptions": {
       "lib": ["DOM", "DOM.Iterable", "ESNext"]
     }
   }

2. Cmd+Click (or Ctrl+Click on Linux/Windows) on any of the lib entries → the corresponding lib.dom.d.ts, lib.dom.iterable.d.ts, lib.esnext.d.ts opens.
3. Toggle "TypeScript: Select TypeScript Version…" between bundled and workspace versions → Cmd+Click target should follow the active selection.
4. In a workspace with no local TypeScript install, links should still resolve to the bundled VS Code TypeScript.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds support for navigating from tsconfig.json compilerOptions.lib entries to their corresponding TypeScript lib .d.ts files, using the currently active TypeScript version when possible.

Changes:

• Exported the workspace TSDK storage key so it can be reused outside the version manager.
• Added compilerOptions.lib document links and resolution logic (preferring active/local TS versions, then bundled).
• Updated extension activation to pass versionProvider and workspaceState into the tsconfig feature registration.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
extensions/typescript-language-features/src/tsServer/versionManager.ts	Exports the workspace TSDK storage key for cross-module use.
extensions/typescript-language-features/src/languageFeatures/tsconfig.ts	Adds lib links + resolution via TS versions; updates register signature and open-link handling.
extensions/typescript-language-features/src/extension.ts	Passes required dependencies to tsconfig.register.
extensions/typescript-language-features/src/extension.browser.ts	Passes required dependencies to tsconfig.register in browser activation.