fix(deps): externalize tree-sitter (#840)

Submitting without approval to fix broken deployment on main. But also, we should lock this down.

scripts/esbuild-banner.js

@@ -0,0 +1,11 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// esbuild-banner.js
+import { createRequire } from 'module';
+const require = createRequire(import.meta.url);
+globalThis.__filename = require('url').fileURLToPath(import.meta.url);
+globalThis.__dirname = require('path').dirname(globalThis.__filename);