feat(hooks): add comment-checker hook for detecting unnecessary comments

- Port Go comment-checker to TypeScript using web-tree-sitter
- Support 38 programming languages via tree-sitter-wasms
- Filter out valid comments: BDD patterns, lint directives, docstrings, shebangs
- Integrate with OpenCode's tool.execute.before/after hooks
- Attach feedback to Write/Edit/MultiEdit tool output

src/hooks/comment-checker/output/formatter.ts

@@ -0,0 +1,11 @@
+import type { FileComments } from "../types"
+import { HOOK_MESSAGE_HEADER } from "../constants"
+import { buildCommentsXml } from "./xml-builder"
+
+export function formatHookMessage(fileCommentsList: FileComments[]): string {
+  if (fileCommentsList.length === 0) {
+    return ""
+  }
+  const xml = buildCommentsXml(fileCommentsList)
+  return `${HOOK_MESSAGE_HEADER}${xml}\n`
+}