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/components/layout/languageSwitcher.tsx

@@ -0,0 +1,17 @@
+'use client';
+import { changeLanguage, TLocales } from '@/locales/translates';
+import Button from '../Button';
+
+export default function ChangeLangButton() {
+  const changeLang = (lang: TLocales) => {
+    changeLanguage(lang);
+    window.location.reload(); // Reload to get new SSR content
+  };
+
+  return (
+    <>
+      <Button onClick={() => changeLang('en')}>English</Button>
+      <Button onClick={() => changeLang('fa')}>فارسی</Button>
+    </>
+  );
+}