fix(auth): make JWT authentication optional with fallback

Modify authentication system to gracefully handle cases where JWT is not enabled or token is missing. This includes:
- Making HTTPBearer auto_error=False to prevent automatic 403 errors
- Updating token dependency to return None when JWT is disabled
- Fixing model deserialization in CrawlResult
- Updating documentation links
- Cleaning up imports

BREAKING CHANGE: Authentication behavior changed to be more permissive when JWT is disabled

deploy/docker/server.py

@@ -92,7 +92,7 @@ async def get_markdown(
     f: FilterType = FilterType.FIT,
     q: Optional[str] = None,
     c: Optional[str] = "0",
-    # token_data: Optional[Dict] = Depends(token_dependency)
+    token_data: Optional[Dict] = Depends(token_dependency)
 ):
     result = await handle_markdown_request(url, f, q, c, config)
     return PlainTextResponse(result)