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-electron/src/electron/contentSecurityPolicy.ts

@@ -0,0 +1,29 @@
+// Copyright 2017-2025 @polkadot/apps authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { HeadersReceivedResponse } from 'electron';
+
+import { session } from 'electron';
+
+export function setupContentSecurityPolicy (_: string): void {
+  session.defaultSession.webRequest.onHeadersReceived((details, respond: (response: HeadersReceivedResponse) => void) => {
+    respond({
+      responseHeaders: {
+        ...details.responseHeaders,
+        'Content-Security-Policy': [
+          "default-src 'self';" +
+          " style-src-elem 'self' https://fonts.googleapis.com/css 'unsafe-inline';" +
+          " font-src data: 'self' https://fonts.gstatic.com;" +
+          " style-src 'unsafe-inline';" +
+          " connect-src 'self' wss: ws:;" +
+          " img-src 'self' data:;" +
+          // react-qr-reader uses an embedded blob
+          " worker-src 'self' blob: filesystem:;" +
+          // unsafe-eval is needed for the WASM content - same as the extension
+          // script hashes here are for the window.top script (not technically needed)
+          " script-src 'self' 'unsafe-eval' 'sha256-02/ejyoV/iwRdJ4NAsxjzF6WVUtLMPM6Nv96EbAm6u8=' 'sha256-wW/WsLudCDaPo/ibpeK0KslHqYpCzcAKNFxFBXwCHJg='"
+        ]
+      }
+    });
+  });
+}