[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/testing/profiling/components/ProfilerWrapper.tsx

@@ -1,12 +1,12 @@
 import { Profiler, ProfilerOnRenderCallback } from 'react';
 import { useRecoilCallback } from 'recoil';
 
+import { isDefined } from 'twenty-shared';
 import { profilingQueueState } from '~/testing/profiling/states/profilingQueueState';
 import { profilingSessionDataPointsState } from '~/testing/profiling/states/profilingSessionDataPointsState';
 import { profilingSessionState } from '~/testing/profiling/states/profilingSessionState';
 import { ProfilingDataPoint } from '~/testing/profiling/types/ProfilingDataPoint';
 import { getProfilingQueueIdentifier } from '~/testing/profiling/utils/getProfilingQueueIdentifier';
-import { isDefined } from '~/utils/isDefined';
 
 export const ProfilerWrapper = ({
   profilingId,

packages/twenty-front/src/testing/profiling/utils/getProfilingReportFromDocument.ts

@@ -1,9 +1,9 @@
 import { isNonEmptyString } from '@sniptt/guards';
 
+import { isDefined } from 'twenty-shared';
 import { PROFILING_REPORTER_DIV_ID } from '~/testing/profiling/constants/ProfilingReporterDivId';
 import { ProfilingReport } from '~/testing/profiling/types/ProfilingReportByRun';
 import { parseProfilingReportString } from '~/testing/profiling/utils/parseProfilingReportString';
-import { isDefined } from '~/utils/isDefined';
 
 export const getProfilingReportFromDocument = (
   documentElement: Element,

packages/twenty-front/src/testing/profiling/utils/getProfilingStory.ts

@@ -1,9 +1,9 @@
 import { StoryObj } from '@storybook/react';
 import { expect, findByTestId } from '@storybook/test';
 
+import { isDefined } from 'twenty-shared';
 import { ProfilerDecorator } from '~/testing/decorators/ProfilerDecorator';
 import { getProfilingReportFromDocument } from '~/testing/profiling/utils/getProfilingReportFromDocument';
-import { isDefined } from '~/utils/isDefined';
 
 export const getProfilingStory = ({
   componentName,