[CHORE] Avoid isDefined duplicated reference, move it to twenty-shared (#9967)

# Introduction
Avoid having multiple `isDefined` definition across our pacakges
Also avoid importing `isDefined` from `twenty-ui` which exposes a huge
barrel for a such little util function

## In a nutshell
Removed own `isDefined.ts` definition from `twenty-ui` `twenty-front`
and `twenty-server` to move it to `twenty-shared`.
Updated imports for each packages, and added explicit dependencies to
`twenty-shared` if not already in place

Related PR https://github.com/twentyhq/twenty/pull/9941

packages/twenty-front/src/modules/users/components/UserProviderEffect.tsx

@@ -16,10 +16,10 @@ import { detectTimeZone } from '@/localization/utils/detectTimeZone';
 import { getDateFormatFromWorkspaceDateFormat } from '@/localization/utils/getDateFormatFromWorkspaceDateFormat';
 import { getTimeFormatFromWorkspaceTimeFormat } from '@/localization/utils/getTimeFormatFromWorkspaceTimeFormat';
 import { ColorScheme } from '@/workspace-member/types/WorkspaceMember';
+import { isDefined } from 'twenty-shared';
 import { WorkspaceMember } from '~/generated-metadata/graphql';
 import { useGetCurrentUserQuery } from '~/generated/graphql';
 import { dynamicActivate } from '~/utils/i18n/dynamicActivate';
-import { isDefined } from '~/utils/isDefined';
 
 export const UserProviderEffect = () => {
   const [isLoading, setIsLoading] = useState(true);