feat(servers): split vscode-html-language-server and add css, json, bash, sql servers

- Split vscode-html-language-server into separate servers for HTML, CSS,
  and JSON with proper language IDs and file extensions
- Added bash-language-server for shell scripts (.sh, .bash)
- Added sqls for SQL files
- Added timeout wrapper to auto-check diagnostics to prevent blocking pi

index.ts

@@ -334,6 +334,18 @@ function pickDiagnosticServers(filePath: string): string[] {
     .map((s) => s.id);
 }
 
+// Timeout Wrapper - Rejects a promise after the given number of milliseconds.
+// Used to prevent async hooks from blocking pi indefinitely.
+function withTimeout<T>(promise: Promise<T>, ms: number): Promise<T> {
+  return new Promise((resolve, reject) => {
+    const timer = setTimeout(() => reject(new Error(`Timeout after ${ms}ms`)), ms);
+    promise.then(
+      (value) => { clearTimeout(timer); resolve(value); },
+      (reason) => { clearTimeout(timer); reject(reason); },
+    );
+  });
+}
+
 // Run LSP Diagnostics - Fans out to all matching servers in a single
 // daemon call. Returns the grouped result map or undefined if no servers.
 async function runDiagnostics(filePath: string): Promise<unknown> {
@@ -557,8 +569,9 @@ export default function (pi: ExtensionAPI) {
     const absolutePath = path.resolve(ctx.cwd, filePath);
 
     try {
-      // Run LSP diagnostics
-      const result = await runDiagnostics(absolutePath);
+      // Run LSP diagnostics with timeout - Prevent the auto-check hook from
+      // blocking pi if the daemon or LSP server is slow or unresponsive.
+      const result = await withTimeout(runDiagnostics(absolutePath), 3000);
       const formatted = formatDiagnostics(result, 10);
 
       // Only send a message if there are actual diagnostics