feat(trigger): enhance trigger management with new error handling and response structure

- Added `TriggerInvokeError` and `TriggerIgnoreEventError` for better error categorization during trigger invocation.
- Updated `TriggerInvokeResponse` to include a `cancelled` field, indicating if a trigger was ignored.
- Enhanced `TriggerManager` to handle specific errors and return appropriate responses.
- Refactored `dispatch_triggered_workflows` to improve workflow execution logic and error handling.

These changes improve the robustness and clarity of the trigger management system.

api/core/plugin/entities/request.py

@@ -247,6 +247,7 @@ class Event(BaseModel):
 
 class TriggerInvokeResponse(BaseModel):
     event: Event
+    cancelled: Optional[bool] = False
 
 
 class PluginTriggerDispatchResponse(BaseModel):