Add Multiselect for forms (#9092)

- Add new FormMultiSelectField component
- Factorize existing display / input into new ui components
- Update the variable resolver to handle arrays properly

<img width="526" alt="Capture d’écran 2024-12-17 à 11 46 38"
src="https://github.com/user-attachments/assets/6d37b513-8caa-43d0-a27e-ab55dac21f6d"
/>

packages/twenty-ui/src/navigation/menu-item/components/MenuItemMultiSelectTag.tsx

@@ -11,7 +11,7 @@ type MenuItemMultiSelectTagProps = {
   className?: string;
   isKeySelected?: boolean;
   onClick?: () => void;
-  color: ThemeColor;
+  color: ThemeColor | 'transparent';
   text: string;
 };