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-api/src/light.spec.ts

@@ -0,0 +1,30 @@
+// Copyright 2017-2025 @polkadot/react-api authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/// <reference types="@polkadot/dev-test/globals.d.ts" />
+
+import fs from 'fs';
+import path from 'path';
+import process from 'process';
+
+import { assert } from '@polkadot/util';
+
+import { lightSpecs } from './light/index.js';
+
+const srcRel = 'packages/react-api/src';
+const specDir = path.join(process.cwd(), srcRel);
+
+describe('lightSpecs', (): void => {
+  for (const [k, specs] of Object.entries(lightSpecs)) {
+    describe(`${k}`, (): void => {
+      for (const [k, info] of Object.entries(specs)) {
+        it(`${k}`, (): void => {
+          assert(
+            fs.existsSync(path.join(specDir, info)),
+            `${srcRel}/${info.slice(2)} does not exist`
+          );
+        });
+      }
+    });
+  }
+});