[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-chrome-extension/src/db/auth.db.ts

@@ -1,10 +1,10 @@
+import { isDefined } from 'twenty-shared';
 import {
   ExchangeAuthCodeInput,
   ExchangeAuthCodeResponse,
   Tokens,
 } from '~/db/types/auth.types';
 import { EXCHANGE_AUTHORIZATION_CODE } from '~/graphql/auth/mutations';
-import { isDefined } from '~/utils/isDefined';
 import { callMutation } from '~/utils/requestDb';
 
 export const exchangeAuthorizationCode = async (

packages/twenty-chrome-extension/src/db/company.db.ts

@@ -1,3 +1,4 @@
+import { isDefined } from 'twenty-shared';
 import {
   CompanyInput,
   CreateCompanyResponse,
@@ -6,7 +7,6 @@ import {
 import { Company, CompanyFilterInput } from '~/generated/graphql';
 import { CREATE_COMPANY } from '~/graphql/company/mutations';
 import { FIND_COMPANY } from '~/graphql/company/queries';
-import { isDefined } from '~/utils/isDefined';
 
 import { callMutation, callQuery } from '../utils/requestDb';
 

packages/twenty-chrome-extension/src/db/person.db.ts

@@ -1,3 +1,4 @@
+import { isDefined } from 'twenty-shared';
 import {
   CreatePersonResponse,
   FindPersonResponse,
@@ -6,7 +7,6 @@ import {
 import { Person, PersonFilterInput } from '~/generated/graphql';
 import { CREATE_PERSON } from '~/graphql/person/mutations';
 import { FIND_PERSON } from '~/graphql/person/queries';
-import { isDefined } from '~/utils/isDefined';
 
 import { callMutation, callQuery } from '../utils/requestDb';
 

packages/twenty-chrome-extension/src/db/token.db.ts

@@ -1,8 +1,8 @@
 import { ApolloClient, InMemoryCache } from '@apollo/client';
 
+import { isDefined } from 'twenty-shared';
 import { Tokens } from '~/db/types/auth.types';
 import { RENEW_TOKEN } from '~/graphql/auth/mutations';
-import { isDefined } from '~/utils/isDefined';
 
 export const renewToken = async (
   appToken: string,