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/jest.config.ts

@@ -12,7 +12,16 @@ const jestConfig: JestConfigWithTsJest = {
   testEnvironment: 'jsdom',
   transformIgnorePatterns: ['../../node_modules/'],
   transform: {
-    '^.+\\.(ts|js|tsx|jsx)$': '@swc/jest',
+    '^.+\\.(ts|js|tsx|jsx)$': [
+      '@swc/jest',
+      {
+        jsc: {
+          experimental: {
+            plugins: [], // Disable Lingui plugin during tests
+          },
+        },
+      },
+    ],
   },
   moduleNameMapper: {
     '\\.(jpg|jpeg|png|gif|webp|svg|svg\\?react)$':