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/InputAddressMulti/Available.tsx

@@ -0,0 +1,35 @@
+// Copyright 2017-2025 @polkadot/react-components authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import React, { useCallback } from 'react';
+
+import AddressToggle from '../AddressToggle.js';
+
+interface Props {
+  address: string;
+  filter: string;
+  isHidden?: boolean;
+  onSelect: (address: string) => void;
+}
+
+function Available ({ address, filter, isHidden, onSelect }: Props): React.ReactElement<Props> | null {
+  const _onSelect = useCallback(
+    () => onSelect(address),
+    [address, onSelect]
+  );
+
+  if (isHidden) {
+    return null;
+  }
+
+  return (
+    <AddressToggle
+      address={address}
+      filter={filter}
+      noToggle
+      onChange={_onSelect}
+    />
+  );
+}
+
+export default React.memo(Available);