fix: resolve CI linting violations

- Fixed import sorting in cli.py, __main__.py, detectors/__init__.py, base.py, python.py, rust.py, openapi.py, models/__init__.py
- Removed unused imports (sys, asyncio, Observer, Text, Parameter, ParameterIn, HTTPMethod, DocConfig, List, Optional)
- Removed trailing whitespace from blank lines
- Split lines exceeding 100 characters
- Added missing __init__ docstrings in generators and static/templates packages

src/docgen/detectors/python.py

@@ -1,10 +1,11 @@
-"""Python endpoint detector for FastAPI, Flask, and Django."""
+{"""Python endpoint detector for FastAPI, Flask, and Django."""
 
 import re
 from pathlib import Path
 from typing import Optional
-from docgen.models import Endpoint, HTTPMethod, Parameter, ParameterIn
+
 from docgen.detectors.base import BaseDetector
+from docgen.models import Endpoint, HTTPMethod
 
 
 class PythonDetector(BaseDetector):
@@ -49,6 +50,7 @@ class PythonDetector(BaseDetector):
     }
 
     def __init__(self):
+        """Initialize the Python detector."""
         self.framework: Optional[str] = None
 
     def detect_endpoints(self, file_path: Path) -> list[Endpoint]: