This PR was created by [GitStart](https://gitstart.com/) to address the requirements from this ticket: [TWNTY-7540](https://clients.gitstart.com/twenty/5449/tickets/TWNTY-7540). --- ### Description Move `utilities/screen-size` to the `twenty-ui` package ### Demo The `useScreenSize` was used to render the mobile nav for example on the landing page. It still renders properly  ###### Fixes [#7540](https://github.com/twentyhq/twenty/issues/7540) ###### Dev QA - [x] `utilities/screen-size` should be moved to the `twenty-ui` folder - [x] The mobile nav should still show on the landing page Co-authored-by: gitstart-twenty <gitstart-twenty@users.noreply.github.com> Co-authored-by: Charles Bochet <charles@twenty.com>