setup localization for twenty-emails (#9806)

One of the steps to address #8128 

How to test:
Please change the locale in the settings and click on change password
button. A password reset email in the preferred locale will be sent.


![image](https://github.com/user-attachments/assets/2b0c2f81-5c4d-4e49-b021-8ee76e7872f2)

![image](https://github.com/user-attachments/assets/0453e321-e5aa-42ea-beca-86e2e97dbee2)

Todo:
- Remove the hardcoded locales for invitation, warn suspended workspace
email, clean suspended workspace emails
- Need to test invitation, email verification, warn suspended workspace
email, clean suspended workspace emails
- The duration variable `5 minutes` is always in english. Do we need to
do something about that? It does seems odd in case of chinese
translations.

Notes:
- Only tested the password reset , password update notify templates.
- Cant test email verification due to error during sign up `Internal
server error: New workspace setup is disabled`

---------

Co-authored-by: Félix Malfait <felix@twenty.com>

packages/twenty-server/src/modules/workspace-member/standard-objects/workspace-member.workspace-entity.ts

@@ -1,7 +1,7 @@
 import { registerEnumType } from '@nestjs/graphql';
 
 import { msg } from '@lingui/core/macro';
-import { FieldMetadataType } from 'twenty-shared';
+import { APP_LOCALES, FieldMetadataType } from 'twenty-shared';
 
 import { Relation } from 'src/engine/workspace-manager/workspace-sync-metadata/interfaces/relation.interface';
 
@@ -109,7 +109,7 @@ export class WorkspaceMemberWorkspaceEntity extends BaseWorkspaceEntity {
     icon: 'IconLanguage',
     defaultValue: "'en'",
   })
-  locale: string;
+  locale: keyof typeof APP_LOCALES;
 
   @WorkspaceField({
     standardId: WORKSPACE_MEMBER_STANDARD_FIELD_IDS.avatarUrl,