Added the foundation for making the frontend multilingual. Now only need to import useTranslation and use t('key') for all user-facing text for all pages (+add key:value pairs in src/locales for each language ofc)

- package.json -> Imported packages i18next & react-i18next for multilingual functionality.
- src/App.jsx -> Imported LanguageSwitcher from ./components/LanguageSwitcher and added <LanguageSwitcher /> component at the beginning of layout so it's always visible.
- src/components/LanguageSwitcher.jsx -> LanguageSwitcher component, consists of a dropdown menu that always appears at top right corner for choosing language.
- src/i18n.js -> Initialize and configure i18next for app-wide multilingual support.
- src/locales/en.json + src/locales/fr.json -> Empty json files that will soon contain translation key:value pairs for each page.
- src/main.jsx -> Imported src/i18n.js for multilingual functionality.

Frontend/src/components/LanguageSwitcher.jsx

@@ -0,0 +1,51 @@
+import React from 'react';
+import { useTranslation } from 'react-i18next';
+
+const languages = [
+  { code: 'en', label: 'English' },
+  { code: 'fr', label: 'Français' },
+  // Add more languages as needed
+];
+
+function LanguageSwitcher() {
+  const { i18n } = useTranslation();
+
+  return (
+    <div
+      style={{
+        position: 'absolute',
+        top: '1rem',
+        right: '1rem',
+        zIndex: 1000,
+        background: 'rgba(255,255,255,0.95)',
+        borderRadius: '4px',
+        padding: '0.25em 0.5em',
+        boxShadow: '0 2px 8px rgba(0,0,0,0.05)'
+      }}
+    >
+      <select
+        value={i18n.language}
+        onChange={e => i18n.changeLanguage(e.target.value)}
+        style={{
+          border: '1px solid #ccc',
+          borderRadius: '4px',
+          padding: '0.25em 2em 0.25em 0.5em', // More right padding for arrow
+          minWidth: '100px',
+          appearance: 'auto', // Use browser default arrow
+          background: '#fff',
+        }}
+
+        aria-label="Select language"
+      >
+        {languages.map(lang => (
+          <option key={lang.code} value={lang.code}>
+            {lang.label}
+          </option>
+        ))}
+      </select>
+    </div>
+  );
+}
+
+export default LanguageSwitcher;
+