Add source code files (detectors, generators, CLI)

src/main.py

@@ -0,0 +1,22 @@
+"""Main entry point for auto-gitignore CLI."""
+
+import sys
+
+from src.cli import main
+
+
+def run_cli() -> None:
+    """Entry point for the CLI."""
+    try:
+        main()
+    except SystemExit:
+        raise
+    except KeyboardInterrupt:
+        sys.exit(130)
+    except Exception as e:
+        print(f"Error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()