feat: Integrate chat feature into main navigation

- Add a "Chat" link to the main navigation for both desktop and mobile views.
- Include a message icon for visual identification and support for multiple languages (English, Spanish, French).
- Update documentation to reflect navigation integration and usage instructions for the chat feature.

src/i18n/types.ts

@@ -6,6 +6,7 @@ export interface LocaleMessages {
     faq: string
     events: string
     market: string
+    chat: string
     login: string
     logout: string
   }