Implementations, CodeLens, IncomingCalls across projects

[sheetalkamat]

Fixes #2177

[Copilot]

Pull request overview

This PR implements cross-project functionality for "Go to Implementation" and CodeLens features, enabling these features to work across project references in a TypeScript workspace. This addresses issue #2177.

Key changes:

• Refactored multi-project reference handling into a reusable multiProjectRequestHandling function
• Extended implementations and CodeLens resolution to search across project references
• Added SymbolAndEntriesData struct to encapsulate symbol lookup results and support implementation traversal
• Moved CodeLens resolution logic from the language service to the server to enable cross-project queries

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
internal/lsp/server.go	Refactored multi-project handling into shared multiProjectRequestHandling function; moved implementations and CodeLens to use multi-project infrastructure; moved CodeLens resolution from LS to server
internal/ls/findallreferences.go	Updated ProvideSymbolsAndEntries to support implementations with queue-based traversal; introduced SymbolAndEntriesData and SymbolEntryTransformOptions types
internal/ls/codelens.go	Removed ResolveCodeLens method (moved to server)
internal/lsp/lsproto/lsp.go	Added HasLocations and HasLocation interfaces for generic location handling
internal/lsp/lsproto/lsp_generated.go	Added GetLocation() and GetLocations() methods to protocol types
internal/lsp/lsproto/_generate/generate.mts	Updated code generator to automatically generate GetLocation() and GetLocations() methods
internal/project/untitled_test.go	Updated test calls to use new ProvideSymbolsAndEntries API
internal/fourslash/tests/stateimplementations_test.go	Added test for implementations across project references
internal/fourslash/tests/statecodelens_test.go	Added tests for CodeLens across project references
testdata/baselines/reference/fourslash/state/implementationsAncestorProjectRefMangement.baseline	New baseline for implementations test
testdata/baselines/reference/fourslash/state/codeLensAcrossProjects.baseline	New baseline for CodeLens across projects test
testdata/baselines/reference/fourslash/codeLenses/codeLensOnFunctionAcrossProjects1.baseline.jsonc	New baseline for function CodeLens across projects

[sheetalkamat]

naming suggestions welcome

[sheetalkamat]

Failure is because of not correctly calling recover to assign request for panic. will take a look .