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.

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

packages/twenty-front/src/modules/settings/components/SettingsNavigationDrawerItems.tsx

@@ -106,7 +106,7 @@ export const SettingsNavigationDrawerItems = () => {
         />
         <SettingsNavigationDrawerItem
           label="Experience"
-          path={SettingsPath.Appearance}
+          path={SettingsPath.Experience}
           Icon={IconColorSwatch}
         />
         <NavigationDrawerItemGroup>