[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/utils/recoil-effects.ts

@@ -1,11 +1,10 @@
-import { AtomEffect } from 'recoil';
 import omit from 'lodash.omit';
+import { AtomEffect } from 'recoil';
 import { z } from 'zod';
 
+import { isDefined } from 'twenty-shared';
 import { cookieStorage } from '~/utils/cookie-storage';
 
-import { isDefined } from './isDefined';
-
 export const localStorageEffect =
   <T>(key?: string): AtomEffect<T> =>
   ({ setSelf, onSet, node }) => {