6071 return only updated fields of records in zapier update trigger (#8193)

- move webhook triggers into `entity-events-to-db.listener.ts`
- refactor event management
- add a `@OnDatabaseEvent` decorator to manage database events
- add updatedFields in updated events
- update openApi webhooks docs
- update zapier integration

packages/twenty-zapier/package.json

@@ -1,6 +1,6 @@
 {
   "name": "twenty-zapier",
-  "version": "1.0.2",
+  "version": "2.0.0",
   "description": "Effortlessly sync Twenty with 3000+ apps. Automate tasks, boost productivity, and supercharge your customer relationships!",
   "main": "src/index.ts",
   "scripts": {