feat(comment-checker): pass custom_prompt to CLI

- Add customPrompt parameter to runCommentChecker function
- Pass --prompt flag to comment-checker CLI when custom_prompt is configured
- Wire up config from plugin initialization

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/index.ts

@@ -233,7 +233,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     : null;
 
   const commentChecker = isHookEnabled("comment-checker")
-    ? createCommentCheckerHooks()
+    ? createCommentCheckerHooks(pluginConfig.comment_checker)
     : null;
   const toolOutputTruncator = isHookEnabled("tool-output-truncator")
     ? createToolOutputTruncatorHook(ctx, { experimental: pluginConfig.experimental })