Add db event trigger and cron trigger to migration v2 (#14772)

## Context
Add DB events triggers and Cron triggers to migration v2 builder/runner
(and adding corresponding services/resolvers)

packages/twenty-server/src/engine/metadata-modules/database-event-trigger/exceptions/database-event-trigger.exception.ts

@@ -0,0 +1,12 @@
+import { CustomException } from 'src/utils/custom-exception';
+
+export class DatabaseEventTriggerException extends CustomException {
+  constructor(message: string, code: DatabaseEventTriggerExceptionCode) {
+    super(message, code);
+  }
+}
+
+export enum DatabaseEventTriggerExceptionCode {
+  DATABASE_EVENT_TRIGGER_NOT_FOUND = 'DATABASE_EVENT_TRIGGER_NOT_FOUND',
+  DATABASE_EVENT_TRIGGER_ALREADY_EXIST = 'DATABASE_EVENT_TRIGGER_ALREADY_EXIST',
+}