Complete Pezkuwi rebrand for Play Store release

User-visible changes:
- All strings.xml: Nova → Pezkuwi (12 languages, 721 references)
- App name: Pezkuwi Wallet
- Deep links: pezkuwiwallet://
- WalletConnect: Pezkuwi Wallet metadata
- Backup files: pezkuwiwallet_backup.json
- Push notifications: Pezkuwi Wallet branding

Technical changes:
- Gradle namespaces: io.pezkuwichain.wallet.*
- JS interface prefix: Pezkuwi_*
- User-Agent: Pezkuwi Wallet (Android)
- Firebase: pezkuwi-wallet project config

Assets:
- Nevroz fire logo (Kurdish colors theme)
- 6 density PNG files

Documentation:
- PACKAGE_STRUCTURE_REBRAND.md for future refactoring

feature-wallet-connect-impl/src/main/res/layout/fragment_wc_session_approve.xml

@@ -126,7 +126,7 @@
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/wcApproveSessionRequestSession"
-                tools:text="Some of the required networks requested by 1inch are not supported in Nova Wallet" />
+                tools:text="Some of the required networks requested by 1inch are not supported in Pezkuwi Wallet" />
 
             <io.novafoundation.nova.feature_account_api.view.AccountView
                 android:id="@+id/wcApproveSessionWallet"