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>

package.json

@@ -22,6 +22,8 @@
     "@jsdevtools/rehype-toc": "^3.0.2",
     "@linaria/core": "^6.2.0",
     "@linaria/react": "^6.2.1",
+    "@lingui/core": "^5.1.2",
+    "@lingui/react": "^5.1.2",
     "@mdx-js/react": "^3.0.0",
     "@microsoft/microsoft-graph-client": "^3.0.7",
     "@nestjs/apollo": "^11.0.5",
@@ -202,6 +204,9 @@
     "@graphql-codegen/typescript": "^3.0.4",
     "@graphql-codegen/typescript-operations": "^3.0.4",
     "@graphql-codegen/typescript-react-apollo": "^3.3.7",
+    "@lingui/cli": "^5.1.2",
+    "@lingui/swc-plugin": "^5.0.2",
+    "@lingui/vite-plugin": "^5.1.2",
     "@microsoft/microsoft-graph-types": "^2.40.0",
     "@nestjs/cli": "^9.0.0",
     "@nestjs/schematics": "^9.0.0",