Add source files (main, cli, indexer modules)

src/indexer/code.py

@@ -1,10 +1,9 @@
 """Code comment indexer for Python, JavaScript, and TypeScript files."""
 
 import ast
-import hashlib
 import re
 from pathlib import Path
-from typing import Any, Dict, Generator, List, Optional, Tuple
+from typing import Any, Dict, List, Optional
 
 from src.indexer.base import BaseIndexer
 from src.models.document import Document, SourceType