feat(copilot): add user-aware LLM calls and project cleanup

- Modified `llm_call` and `generate_title` functions to accept `config` parameter, extracting `user_id` and `jwt_token` for per-user LLM configuration and API authentication
- Updated `create_base_model_with_tools` and `create_title_model` calls to pass user authentication details
- Added `jwt_token` to state for tool usage in GNS3 API calls
- Integrated chat router into controller API routes under `/chat` endpoint
- Implemented `_cleanup_copilot_agent` method in `Project` class to remove AgentService resources upon project closure, preventing resource leaks
- Enhanced error handling in agent cleanup to avoid interrupting project close operations

gns3server/api/routes/controller/__init__.py

@@ -16,6 +16,7 @@
 
 from fastapi import APIRouter, Depends
 
+from . import chat
 from . import controller
 from . import appliances
 from . import computes
@@ -152,3 +153,9 @@ router.include_router(
     prefix="/access",
     tags=["LLM Model Configurations"]
 )
+
+router.include_router(
+    chat.router,
+    prefix="/chat",
+    tags=["Chat"]
+)