Consistently name VS types with prefix VS

[jakebailey]

This was missed in review; prefix these so we know they are for VS, and then use the Go-style VS prefix as we had in previous code.

[Copilot]

Pull request overview

Mechanical rename to consistently use the Go-style VS prefix (instead of Vs) for all Visual Studio-specific types, functions, fields, and a test name. The change updates the LSP proto generator script and its generated output, plus all consumers in the language service, server, fourslash harness, and tests.

Changes:

• Rename generator entries (and regenerate lsp_generated.go) so VS-specific structures, params/responses, and the VSReferenceKind enum use the VS prefix; ClassifiedTextRun/ClassifiedTextElement become VSClassifiedTextRun/VSClassifiedTextElement.
• Update all Go call sites (internal/ls/*, internal/lsp/server.go, internal/fourslash/*) to the new identifiers, including ProvideVSReferences, combineVSReferences, handleVSOnAutoInsert, and VerifyBaselineVSFindAllReferences.
• Update one test function/comment (TestRaceHasChangesVSUpdateWatchState) for naming consistency.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
internal/lsp/lsproto/_generate/generate.mts	Rename VS structures/enums in the generator source
internal/lsp/lsproto/lsp_generated.go	Regenerated output reflecting renamed types/methods/enum values
internal/lsp/server.go	Update handler registrations and capability struct usage to new names
internal/ls/findallreferences.go	Rename ProvideVsReferences/symbolAndEntriesToVsReferences and switch to VSClassifiedText* types
internal/ls/crossproject.go	Rename combineVsReferences and field accesses on the renamed response type
internal/ls/autoinsert.go	Use renamed VSOnAutoInsert* params/response types
internal/ls/signaturehelp.go	Use VSClassifiedTextElement/VSClassifiedTextRun
internal/ls/displaypartswriter.go	Update runs field and GetRuns signature to VSClassifiedTextRun
internal/fourslash/fourslash.go	Rename VerifyBaselineVsFindAllReferences and update VS field/type accesses
internal/fourslash/tests/constructorFindAllReferences1VS_test.go	Call renamed verifier
internal/fourslash/tests/findAllRefsForDefaultExportVS_test.go	Call renamed verifier
internal/fourslash/tests/findAllRefsInheritedProperties1VS_test.go	Call renamed verifier
internal/fourslash/tests/findReferencesAcrossMultipleProjectsVS_test.go	Call renamed verifier
internal/fourslash/tests/tsxFindAllReferences1VS_test.go	Call renamed verifier
internal/vfs/vfswatch/vfswatch_race_test.go	Rename test function and its doc comment to VS casing