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/react-components/src/InputAddress/createHeader.tsx

@@ -0,0 +1,17 @@
+// Copyright 2017-2025 @polkadot/react-components authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { KeyringSectionOption } from '@polkadot/ui-keyring/options/types';
+
+import React from 'react';
+
+import Dropdown from '../Dropdown.js';
+
+export default function createHeader (option: KeyringSectionOption): React.ReactNode {
+  return (
+    <Dropdown.Header
+      content={option.name}
+      key={option.key || option.name}
+    />
+  );
+}