refactor(mobile): Remove i18n, expand core screens, update plan

BREAKING: Removed multi-language support (i18n) - will be re-added later

Changes:
- Removed i18n system (6 language files, LanguageContext)
- Expanded WalletScreen, SettingsScreen, SwapScreen with more features
- Added KurdistanSun component, HEZ/PEZ token icons
- Added EditProfileScreen, WalletSetupScreen
- Added button e2e tests (Profile, Settings, Wallet)
- Updated plan: honest assessment - 42 nav buttons with mock data
- Fixed terminology: Polkadot→Pezkuwi, Substrate→Bizinikiwi

Reality check: UI complete with mock data, converting to production one-by-one

mobile/src/screens/BeCitizenApplyScreen.tsx

@@ -12,7 +12,6 @@ import {
   ActivityIndicator,
   Modal,
 } from 'react-native';
-import { useTranslation } from 'react-i18next';
 import { useNavigation } from '@react-navigation/native';
 import { usePezkuwi } from '../contexts/PezkuwiContext';
 import {
@@ -97,7 +96,6 @@ const CustomPicker: React.FC<{
 };
 
 const BeCitizenApplyScreen: React.FC = () => {
-  const { t } = useTranslation();
   const navigation = useNavigation();
   const { api, selectedAccount } = usePezkuwi();
   const [isSubmitting, setIsSubmitting] = useState(false);