fix: resolve CI linting failures

- Fix corrupted docstrings (curly braces to quotes)
- Sort imports according to ruff standards
- Split long line in javascript.py for readability
- Add module-level docstrings to test files
- Add docstring to BaseGenerator.__init__ method
- Fix regex pattern in RustDetector

tests/unit/test_models.py

@@ -1,3 +1,6 @@
+#!/usr/bin/env python3
+"""Tests for docgen models."""
+
 from pathlib import Path
 
 from docgen.models import (