Serverless function UI (#6388)

https://www.figma.com/design/xt8O9mFeLl46C5InWwoMrN/Twenty?node-id=36235-120877

Did not do the file manager part. A Function is defined using one unique
file at the moment

Feature protected by featureFlag `IS_FUNCTION_SETTINGS_ENABLED`

## Demo


https://github.com/user-attachments/assets/0acb8291-47b4-4521-a6fa-a88b9198609b

packages/twenty-server/src/engine/integrations/serverless/serverless.service.ts

@@ -9,6 +9,10 @@ import { ServerlessFunctionEntity } from 'src/engine/metadata-modules/serverless
 export class ServerlessService implements ServerlessDriver {
   constructor(@Inject(SERVERLESS_DRIVER) private driver: ServerlessDriver) {}
 
+  async delete(serverlessFunction: ServerlessFunctionEntity): Promise<void> {
+    return this.driver.delete(serverlessFunction);
+  }
+
   async build(serverlessFunction: ServerlessFunctionEntity): Promise<void> {
     return this.driver.build(serverlessFunction);
   }