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/generators/markdown.py

@@ -1,15 +1,18 @@
-"""Markdown documentation generator."""
+{"""Markdown documentation generator."""
 
 from pathlib import Path
+
 from jinja2 import Environment, FileSystemLoader
-from docgen.models import DocConfig, Endpoint
+
 from docgen.generators import BaseGenerator
+from docgen.models import DocConfig, Endpoint
 
 
 class MarkdownGenerator(BaseGenerator):
     """Generator for Markdown documentation."""
 
     def __init__(self, config: DocConfig = None):
+        """Initialize the Markdown generator."""
         super().__init__(config)
         template_dir = Path(__file__).parent.parent / "templates"
         self.env = Environment(loader=FileSystemLoader(template_dir))