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-settings-impl/src/main/res/layout/fragment_settings.xml

@@ -289,7 +289,7 @@
             android:layout_marginTop="8dp"
             android:layout_marginBottom="32dp"
             android:textColor="@color/text_secondary"
-            tools:text="Nova Wallet v2.0" />
+            tools:text="Pezkuwi Wallet v2.0" />
     </LinearLayout>
 
 </ScrollView>