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/lingui.config.ts

@@ -0,0 +1,12 @@
+import { defineConfig } from '@lingui/cli';
+
+export default defineConfig({
+  sourceLocale: 'en',
+  locales: ['fr', 'en', 'pt', 'de', 'it', 'es', 'zh'],
+  catalogs: [
+    {
+      path: '<rootDir>/src/locales/{locale}/messages',
+      include: ['src'],
+    },
+  ],
+});