Create fake hidden fields group (#18525)

## Demo


https://github.com/user-attachments/assets/43f31c43-fe37-4553-ad42-fc97a948d6ea

## Ungrouped fields

<img width="3456" height="2160" alt="CleanShot 2026-03-10 at 13 52
57@2x"
src="https://github.com/user-attachments/assets/13d1db63-59ac-4e2b-8950-fccf430176c4"
/>

packages/twenty-shared/src/types/page-layout/page-layout-widget-configuration.type.ts

@@ -104,6 +104,7 @@ export type FieldsConfiguration = {
   configurationType: 'FIELDS';
   viewId?: string | null;
   newFieldDefaultConfiguration?: NewFieldDefaultConfiguration | null;
+  shouldAllowUserToSeeHiddenFields?: boolean;
 };
 
 export type FieldRichTextConfiguration = {