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/workspace-manager/workspace-sync-metadata/commands/add-standard-id.command.ts

@@ -62,6 +62,7 @@ export class AddStandardIdCommand extends CommandRunner {
             IS_MESSAGING_ALIAS_FETCHING_ENABLED: true,
             IS_GOOGLE_CALENDAR_SYNC_V2_ENABLED: true,
             IS_FREE_ACCESS_ENABLED: false,
+            IS_FUNCTION_SETTINGS_ENABLED: false,
             IS_WORKFLOW_ENABLED: false,
           },
         );
@@ -81,6 +82,7 @@ export class AddStandardIdCommand extends CommandRunner {
           IS_MESSAGING_ALIAS_FETCHING_ENABLED: true,
           IS_GOOGLE_CALENDAR_SYNC_V2_ENABLED: true,
           IS_FREE_ACCESS_ENABLED: false,
+          IS_FUNCTION_SETTINGS_ENABLED: false,
           IS_WORKFLOW_ENABLED: false,
         },
       );