[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/activities/timeline-activities/rows/calendar/components/EventCardCalendarEvent.tsx

@@ -8,12 +8,12 @@ import { useFindOneRecord } from '@/object-record/hooks/useFindOneRecord';
 import { useUpsertRecordsInStore } from '@/object-record/record-store/hooks/useUpsertRecordsInStore';
 import { UserContext } from '@/users/contexts/UserContext';
 import { useContext } from 'react';
+import { isDefined } from 'twenty-shared';
 import {
   formatToHumanReadableDay,
   formatToHumanReadableMonth,
   formatToHumanReadableTime,
 } from '~/utils/format/formatDate';
-import { isDefined } from '~/utils/isDefined';
 import { isUndefinedOrNull } from '~/utils/isUndefinedOrNull';
 
 const StyledEventCardCalendarEventContainer = styled.div`

packages/twenty-front/src/modules/activities/timeline-activities/rows/main-object/components/EventFieldDiffValueEffect.tsx

@@ -5,7 +5,7 @@ import { FieldMetadataItem } from '@/object-metadata/types/FieldMetadataItem';
 import { ObjectMetadataItem } from '@/object-metadata/types/ObjectMetadataItem';
 import { useSetRecordValue } from '@/object-record/record-store/contexts/RecordFieldValueSelectorContext';
 import { recordStoreFamilyState } from '@/object-record/record-store/states/recordStoreFamilyState';
-import { isDefined } from 'twenty-ui';
+import { isDefined } from 'twenty-shared';
 
 export const EventFieldDiffValueEffect = ({
   diffArtificialRecordStoreId,

packages/twenty-front/src/modules/activities/timeline-activities/rows/message/components/EventCardMessage.tsx

@@ -8,7 +8,7 @@ import { EventCardMessageNotShared } from '@/activities/timeline-activities/rows
 import { CoreObjectNameSingular } from '@/object-metadata/types/CoreObjectNameSingular';
 import { useFindOneRecord } from '@/object-record/hooks/useFindOneRecord';
 import { useUpsertRecordsInStore } from '@/object-record/record-store/hooks/useUpsertRecordsInStore';
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 const StyledEventCardMessageContainer = styled.div`
   display: flex;

packages/twenty-front/src/modules/activities/timeline-activities/utils/getTimelineActivityAuthorFullName.ts

@@ -1,6 +1,6 @@
 import { TimelineActivity } from '@/activities/timeline-activities/types/TimelineActivity';
 import { CurrentWorkspaceMember } from '@/auth/states/currentWorkspaceMemberState';
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 export const getTimelineActivityAuthorFullName = (
   event: TimelineActivity,

packages/twenty-front/src/modules/activities/timeline-activities/utils/groupEventsByMonth.ts

@@ -1,5 +1,5 @@
 import { TimelineActivity } from '@/activities/timeline-activities/types/TimelineActivity';
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 export type EventGroup = {
   month: number;