feat(i18n): implement language switching and localization support

- Remove i18next configuration and dependencies
- Add language switcher component
- Integrate language change functionality with cookies
- Update translations for English and Persian
- Modify layout and page components to support dynamic language rendering
- Refactor Tailwind CSS configuration for custom colors

next.config.ts

@@ -1,7 +1,5 @@
-import type { NextConfig } from "next";
+import type { NextConfig } from 'next';
 
-const nextConfig: NextConfig = {
-  /* config options here */
-};
+const nextConfig: NextConfig = {};
 
 export default nextConfig;