Set up localization with feature flag control (#9649)

Refers #8128 

Changes Introduced:
- Added i18n configuration.
- Added a feature flag for localization.
- Enabled language switching based on the flag.

---------

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

packages/twenty-front/src/utils/__tests__/title-utils.test.ts

@@ -15,8 +15,8 @@ describe('title-utils', () => {
     expect(getPageTitleFromPath('/settings/profile')).toBe(
       SettingsPageTitles.Profile,
     );
-    expect(getPageTitleFromPath('/settings/appearance')).toBe(
-      SettingsPageTitles.Appearance,
+    expect(getPageTitleFromPath('/settings/experience')).toBe(
+      SettingsPageTitles.Experience,
     );
     expect(getPageTitleFromPath('/settings/accounts')).toBe(
       SettingsPageTitles.Accounts,

packages/twenty-front/src/utils/title-utils.ts

@@ -4,7 +4,7 @@ import { SettingsPath } from '@/types/SettingsPath';
 
 export enum SettingsPageTitles {
   Accounts = 'Account - Settings',
-  Appearance = 'Appearance - Settings',
+  Experience = 'Experience - Settings',
   Profile = 'Profile - Settings',
   Objects = 'Data model - Settings',
   Members = 'Members - Settings',
@@ -17,7 +17,7 @@ export enum SettingsPageTitles {
 
 enum SettingsPathPrefixes {
   Accounts = `${AppBasePath.Settings}/${SettingsPath.Accounts}`,
-  Appearance = `${AppBasePath.Settings}/${SettingsPath.Appearance}`,
+  Experience = `${AppBasePath.Settings}/${SettingsPath.Experience}`,
   Profile = `${AppBasePath.Settings}/${SettingsPath.ProfilePage}`,
   Objects = `${AppBasePath.Settings}/${SettingsPath.Objects}`,
   Members = `${AppBasePath.Settings}/${SettingsPath.WorkspaceMembersPage}`,
@@ -49,8 +49,8 @@ export const getPageTitleFromPath = (pathname: string): string => {
       return 'Create Workspace';
     case AppPath.CreateProfile:
       return 'Create Profile';
-    case SettingsPathPrefixes.Appearance:
-      return SettingsPageTitles.Appearance;
+    case SettingsPathPrefixes.Experience:
+      return SettingsPageTitles.Experience;
     case SettingsPathPrefixes.Accounts:
       return SettingsPageTitles.Accounts;
     case SettingsPathPrefixes.Profile: