feat: complete Pezkuwi rebrand - remove other networks

- Remove all Polkadot ecosystem networks from chain selector
- Keep only: Pezkuwi Relay Chain, Zagros Relay Chain, Pezkuwi Beta Testnet
- Update extension ID from polkadot-js to pezkuwi
- Update PhishingDetected to use Pezkuwi branding
- Update metadataMock: Westend → Zagros, WND → ZGR
- Disable Ledger chains (no Pezkuwi Ledger app yet)
- Update Identicon to handle pezkuwi icon theme
- Clean up translation files

Breaking: Extension now only supports Pezkuwi networks

package.json

@@ -14,7 +14,7 @@
   },
   "sideEffects": false,
   "type": "module",
-  "version": "0.62.8",
+  "version": "0.62.12",
   "versions": {
     "git": "0.62.6",
     "npm": "0.62.6"