[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/auth/sign-in-up/components/SignInUpGlobalScopeForm.tsx

@@ -26,7 +26,7 @@ import { authProvidersState } from '@/client-config/states/authProvidersState';
 import { useRedirectToWorkspaceDomain } from '@/domain-manager/hooks/useRedirectToWorkspaceDomain';
 import { SnackBarVariant } from '@/ui/feedback/snack-bar-manager/components/SnackBar';
 import { useSnackBar } from '@/ui/feedback/snack-bar-manager/hooks/useSnackBar';
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 const StyledContentContainer = styled(motion.div)`
   margin-bottom: ${({ theme }) => theme.spacing(8)};

packages/twenty-front/src/modules/auth/sign-in-up/components/SignInUpSSOIdentityProviderSelection.tsx

@@ -7,7 +7,7 @@ import { useRecoilValue } from 'recoil';
 import { HorizontalSeparator, MainButton } from 'twenty-ui';
 
 import { workspaceAuthProvidersState } from '@/workspace/states/workspaceAuthProvidersState';
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 const StyledContentContainer = styled.div`
   margin-bottom: ${({ theme }) => theme.spacing(8)};

packages/twenty-front/src/modules/auth/sign-in-up/components/SignInUpWithCredentials.tsx

@@ -14,8 +14,8 @@ import styled from '@emotion/styled';
 import { useMemo, useState } from 'react';
 import { useFormContext } from 'react-hook-form';
 import { useRecoilValue } from 'recoil';
+import { isDefined } from 'twenty-shared';
 import { Loader, MainButton } from 'twenty-ui';
-import { isDefined } from '~/utils/isDefined';
 
 const StyledForm = styled.form`
   align-items: center;

packages/twenty-front/src/modules/auth/sign-in-up/components/SignInUpWithSSO.tsx

@@ -6,8 +6,8 @@ import {
 import { workspaceAuthProvidersState } from '@/workspace/states/workspaceAuthProvidersState';
 import { useTheme } from '@emotion/react';
 import { useRecoilValue, useSetRecoilState } from 'recoil';
+import { isDefined } from 'twenty-shared';
 import { HorizontalSeparator, IconLock, MainButton } from 'twenty-ui';
-import { isDefined } from '~/utils/isDefined';
 
 export const SignInUpWithSSO = () => {
   const theme = useTheme();

packages/twenty-front/src/modules/auth/sign-in-up/components/SignInUpWorkspaceScopeFormEffect.tsx

@@ -10,7 +10,7 @@ import { captchaState } from '@/client-config/states/captchaState';
 import { workspaceAuthProvidersState } from '@/workspace/states/workspaceAuthProvidersState';
 import { useEffect, useState } from 'react';
 import { useRecoilValue, useSetRecoilState } from 'recoil';
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 const searchParams = new URLSearchParams(window.location.search);
 const email = searchParams.get('email');