Update .gitignore to exclude user-specific folders

- Add .mini-rag/ to gitignore (user-specific index data, 1.6MB)
- Add .claude/ to gitignore (personal Claude Code settings)
- Keep repo lightweight and focused on source code
- Users can quickly create their own index with: ./rag-mini index .

.gitignore

@@ -41,10 +41,14 @@ Thumbs.db
 
 # RAG system specific
 .claude-rag/
+.mini-rag/
 *.lance/
 *.db
 manifest.json
 
+# Claude Code specific
+.claude/
+
 # Logs and temporary files
 *.log
 *.tmp