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/engine/metadata-modules/field-metadata/field-metadata.service.ts

@@ -4,7 +4,7 @@ import { InjectDataSource, InjectRepository } from '@nestjs/typeorm';
 import { i18n } from '@lingui/core';
 import { TypeOrmQueryService } from '@ptc-org/nestjs-query-typeorm';
 import isEmpty from 'lodash.isempty';
-import { FieldMetadataType, isDefined } from 'twenty-shared';
+import { APP_LOCALES, FieldMetadataType, isDefined } from 'twenty-shared';
 import { DataSource, FindOneOptions, Repository } from 'typeorm';
 import { v4 as uuidV4, v4 } from 'uuid';
 
@@ -778,7 +778,7 @@ export class FieldMetadataService extends TypeOrmQueryService<FieldMetadataEntit
   async resolveTranslatableString(
     fieldMetadata: FieldMetadataDTO,
     labelKey: 'label' | 'description',
-    locale: string | undefined,
+    locale: keyof typeof APP_LOCALES | undefined,
   ): Promise<string> {
     if (fieldMetadata.isCustom) {
       return fieldMetadata[labelKey] ?? '';