Fix hello world application (#14880)

Updates of the hello-world application
- remove the old hello-world application
- adds an object "postCard"
- adds a serverlessFunction `create-new-post-card` that calls the twenty
api to create a new postCard record
- add a route trigger /post-card/create?recipient=John

packages/twenty-cli/src/commands/app-add.command.ts

@@ -104,7 +104,11 @@ export class AppAddCommand {
         name: 'entity',
         message: `What entity do you want to create?`,
         default: '',
-        choices: [SyncableEntity.SERVERLESS_FUNCTION, SyncableEntity.TRIGGER],
+        choices: [
+          SyncableEntity.SERVERLESS_FUNCTION,
+          SyncableEntity.OBJECT,
+          SyncableEntity.TRIGGER,
+        ],
       },
     ]);
 

packages/twenty-cli/src/constants/base-application-project/.gitignore

@@ -0,0 +1 @@
+.yarn/install-state.gz