[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/ui/layout/expandable-list/components/ExpandableList.tsx

@@ -4,7 +4,7 @@ import { AnimatedContainer, Chip, ChipVariant } from 'twenty-ui';
 
 import { ExpandedListDropdown } from '@/ui/layout/expandable-list/components/ExpandedListDropdown';
 import { isFirstOverflowingChildElement } from '@/ui/layout/expandable-list/utils/isFirstOverflowingChildElement';
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 const StyledContainer = styled.div`
   align-items: center;

packages/twenty-front/src/modules/ui/layout/expandable-list/components/__stories__/ExpandableList.stories.tsx

@@ -2,14 +2,10 @@ import styled from '@emotion/styled';
 import { expect } from '@storybook/jest';
 import { Meta, StoryObj } from '@storybook/react';
 import { userEvent, within } from '@storybook/test';
-import {
-  ComponentDecorator,
-  isDefined,
-  MAIN_COLOR_NAMES,
-  Tag,
-} from 'twenty-ui';
 
 import { ExpandableList } from '@/ui/layout/expandable-list/components/ExpandableList';
+import { isDefined } from 'twenty-shared';
+import { ComponentDecorator, MAIN_COLOR_NAMES, Tag } from 'twenty-ui';
 
 const StyledContainer = styled.div`
   padding: ${({ theme }) => theme.spacing(1)};

packages/twenty-front/src/modules/ui/layout/expandable-list/utils/isFirstOverflowingChildElement.ts

@@ -1,4 +1,4 @@
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 export const isFirstOverflowingChildElement = ({
   containerElement,