chore(gitignore): add .claude directory to ignore list

- Add .claude directory to .gitignore
- Fix missing trailing newline

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Author: appleboy

.gitignore

@@ -38,4 +38,5 @@ coverage.txt
 node_modules
 config.yml
 dist/
-.idea
+.idea
+.claude