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/test-support/src/utils/renderedScreenUtils.ts

@@ -0,0 +1,28 @@
+// Copyright 2017-2025 @polkadot/test-supports authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/* global expect */
+
+import { fireEvent, screen } from '@testing-library/react';
+
+export const clickButton = async (buttonName: string): Promise<void> => {
+  const button = await screen.findByRole('button', { name: buttonName });
+
+  fireEvent.click(button);
+};
+
+export const assertText = async (text: string): Promise<HTMLElement> => {
+  return screen.findByText(text);
+};
+
+export const fillInput = (inputTestId: string, value: string): void => {
+  const nameInput = screen.getByTestId(inputTestId);
+
+  fireEvent.change(nameInput, { target: { value } });
+};
+
+export const assertButtonDisabled = (buttonName: string): void => {
+  const button = screen.getByRole('button', { name: buttonName });
+
+  expect(button).toHaveClass('isDisabled');
+};