fix(lsp): correct workspace and document color capabilities and add tailwind lsp - #2736

Greptile Summary

This PR adds an opt-in Tailwind CSS language server and corrects LSP workspace-root, workspace-folder, language-alias, and document-color capability handling.

• Registers the Tailwind server and its npm installer in the built-in catalog.
• Normalizes JavaScript and TypeScript language aliases for Tailwind servers.
• Advertises the runtime root during initialization while preventing duplicate initial workspace-folder notifications.
• Declares document-color dynamic registration unsupported and adds focused unit coverage.

Confidence Score: 4/5

The PR is not yet safe to merge because enabled Tailwind clients still discard watched-file registrations and can present stale completions and diagnostics after project changes.

The transport acknowledges client/registerCapability without storing or applying registrations, and no watched-file notification path was added, so the previously reported Tailwind stale-state failure remains.

Files Needing Attention: src/cm/lsp/transport.ts, src/cm/lsp/clientManager.ts

Important Files Changed

Sequence Diagram

sequenceDiagram
  participant Editor
  participant Manager as LspClientManager
  participant Workspace as AcodeWorkspace
  participant Tailwind as Tailwind LSP
  Editor->>Manager: Open supported document
  Manager->>Tailwind: initialize(rootUri, workspaceFolders)
  Manager->>Workspace: seed initialFolders
  Workspace-->>Manager: suppress duplicate initial-folder add
  Manager->>Tailwind: attach document with normalized language ID

_{Reviews (2): Last reviewed commit: "fix" | Re-trigger Greptile}