Add .ralph/ to .gitignore

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Entire-Checkpoint: b8c7a3759ebe

Author: jeevanpillay

.gitignore

@@ -4,3 +4,4 @@ dist
 .DS_Store
 .env
 coverage
+.ralph/