[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/TextInput.tsx

@@ -8,7 +8,7 @@ import {
 import { InputHotkeyScope } from '@/ui/input/types/InputHotkeyScope';
 import { usePreviousHotkeyScope } from '@/ui/utilities/hotkey/hooks/usePreviousHotkeyScope';
 import { useScopedHotkeys } from '@/ui/utilities/hotkey/hooks/useScopedHotkeys';
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 export type TextInputProps = TextInputV2ComponentProps & {
   disableHotkeys?: boolean;