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

src/locales/en.ts

@@ -0,0 +1,10 @@
+const en = {
+  pages_home_title: 'Home',
+  pages_home_description: 'Welcome to the home page',
+  pages_about_title: 'About Us',
+  pages_about_description: 'Learn more about us on this page',
+  pages_contact_title: 'Contact Us',
+  pages_contact_description: 'Get in touch with us through this page',
+};
+
+export default en;