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-staking-impl/src/main/res/layout/view_your_pool.xml

@@ -42,7 +42,7 @@
         app:layout_constraintHorizontal_bias="0"
         app:layout_constraintStart_toEndOf="@+id/yourPoolIcon"
         app:layout_constraintTop_toTopOf="@+id/yourPoolIcon"
-        tools:text="✨ Nova Wallet ✨ — Pool #1 — Recommended Validators" />
+        tools:text="🔥 Pezkuwi Wallet 🔥 — Pool #1 — Recommended Validators" />
 
     <com.facebook.shimmer.ShimmerFrameLayout
         android:id="@+id/yourPoolLoadingGroup"