refactor(api): refactor all

- Replaced direct imports of `TriggerProviderID` and `ToolProviderID` from `core.plugin.entities.plugin` with imports from `models.provider_ids` for better organization.
- Refactored workflow node classes to inherit from a unified `Node` class, improving consistency and maintainability.
- Removed unused code and comments to clean up the implementation, particularly in the `workflow_trigger.py` and `builtin_tools_manage_service.py` files.

These changes enhance the clarity and structure of the codebase, facilitating easier future modifications.

api/tasks/trigger_processing_tasks.py

@@ -10,10 +10,10 @@ import logging
 from celery import shared_task
 from sqlalchemy.orm import Session
 
-from core.plugin.entities.plugin import TriggerProviderID
 from core.trigger.trigger_manager import TriggerManager
 from extensions.ext_database import db
 from extensions.ext_storage import storage
+from models.provider_ids import TriggerProviderID
 from models.trigger import TriggerSubscription
 from services.trigger_debug_service import TriggerDebugService
 from services.trigger_service import TriggerService