chore: Adjust form app files to have .ee extension

packages/backend/src/apps/forms/index.ee.js

@@ -1,5 +1,5 @@
 import defineApp from '../../helpers/define-app.js';
-import triggers from './triggers/index.js';
+import triggers from './triggers/index.ee.js';
 
 export default defineApp({
   name: 'Forms',

packages/backend/src/apps/forms/triggers/index.ee.js

@@ -0,0 +1,3 @@
+import formSubmittion from './form-submission/index.ee.js';
+
+export default [formSubmittion];

packages/backend/src/apps/forms/triggers/index.js

@@ -1,3 +0,0 @@
-import formSubmittion from './form-submission/index.js';
-
-export default [formSubmittion];