Add Pezkuwi SDK UI - Polkadot.js Apps clone

- Clone Polkadot.js Apps repository
- Update package.json with Pezkuwi branding
- Add Pezkuwi endpoint to production chains (wss://pezkuwichain.app:9944)
- Create comprehensive README for SDK UI
- Set up project structure with all packages

Next steps:
- Apply Kurdistan colors (Kesk, Sor, Zer, Spi + Black) to UI theme
- Replace logos with Pezkuwi branding
- Test build and deployment

pezkuwi-sdk-ui/packages/apps/src/initBufferHack.ts

@@ -0,0 +1,13 @@
+// Copyright 2017-2025 @polkadot/apps authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import { xglobal } from '@polkadot/x-global';
+
+try {
+  // HACK: Construct a Buffer to ensure that it is actually available in our context
+  if (Buffer.from([1, 2, 3]).length === 3) {
+    xglobal.Buffer = Buffer;
+  }
+} catch {
+  // ignore
+}