fix: resolve CI linting failures

- Remove unused imports across all modules
- Remove unused variables (names, color, output, original_line, extras)
- Fix regex syntax errors in parser files
- Remove unused Dependency imports from parsers

tests/unit/test_cli.py

@@ -1,4 +1,4 @@
-from unittest.mock import patch
+import pytest
 from click.testing import CliRunner
 from pathlib import Path
 import tempfile