[UI] Remove theme constants from twenty-front and use the ones exported from twenty-ui. (#5558)

Some parts of the Frontend used theme constants exported from
`modules/ui` while other parts used theme constants exported from
`twenty-ui`.

This PR centralizes theme constants by removing them from `modules/ui`
completely.

packages/twenty-front/src/modules/ui/utilities/responsive/hooks/useIsMobile.ts

@@ -1,6 +1,5 @@
 import { useMediaQuery } from 'react-responsive';
-
-import { MOBILE_VIEWPORT } from '@/ui/theme/constants/MobileViewport';
+import { MOBILE_VIEWPORT } from 'twenty-ui';
 
 export const useIsMobile = () =>
   useMediaQuery({ query: `(max-width: ${MOBILE_VIEWPORT}px)` });