[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-server/src/engine/metadata-modules/serverless-function/serverless-function.service.ts

@@ -5,6 +5,7 @@ import { basename, dirname, join } from 'path';
 
 import deepEqual from 'deep-equal';
 import { IsNull, Not, Repository } from 'typeorm';
+import { isDefined } from 'twenty-shared';
 
 import { FileStorageExceptionCode } from 'src/engine/core-modules/file-storage/interfaces/file-storage-exception';
 import { ServerlessExecuteResult } from 'src/engine/core-modules/serverless/drivers/interfaces/serverless-driver.interface';
@@ -34,7 +35,6 @@ import {
   ServerlessFunctionException,
   ServerlessFunctionExceptionCode,
 } from 'src/engine/metadata-modules/serverless-function/serverless-function.exception';
-import { isDefined } from 'src/utils/is-defined';
 
 @Injectable()
 export class ServerlessFunctionService {