[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/input/components/SelectInput.tsx

@@ -8,7 +8,8 @@ import { useScopedHotkeys } from '@/ui/utilities/hotkey/hooks/useScopedHotkeys';
 import { useListenClickOutside } from '@/ui/utilities/pointer-event/hooks/useListenClickOutside';
 import { useEffect, useMemo, useRef, useState } from 'react';
 import { Key } from 'ts-key-enum';
-import { MenuItemSelectTag, TagColor, isDefined } from 'twenty-ui';
+import { isDefined } from 'twenty-shared';
+import { MenuItemSelectTag, TagColor } from 'twenty-ui';
 
 interface SelectInputProps {
   onOptionSelected: (selectedOption: SelectOption) => void;