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-hooks/src/useMapKeys.ts

@@ -0,0 +1,41 @@
+// Copyright 2017-2025 @polkadot/react-hooks authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { QueryableStorageEntry } from '@polkadot/api/types';
+
+import { useEffect, useRef, useState } from 'react';
+
+import { stringify } from '@polkadot/util';
+
+interface Options <T> {
+  transform?: (value: any[]) => T[];
+}
+
+// FIXME This is generic, we cannot really use createNamedHook
+export function useMapKeys <T = any> (entry: QueryableStorageEntry<'promise'> | null | false | undefined, params?: unknown[] | null, { transform }: Options<T> = {}, at?: string | null | false): T[] | undefined {
+  const [state, setState] = useState<T[] | undefined>();
+  const checkRef = useRef<string | null>(null);
+
+  useEffect((): void => {
+    if (entry && params) {
+      const check = stringify({ at, params });
+
+      if (check !== checkRef.current) {
+        checkRef.current = check;
+
+        (
+          at && at !== '0'
+            // eslint-disable-next-line deprecation/deprecation
+            ? entry.keysAt(at, ...params)
+            : entry.keys(...params)
+        ).then((keys) => setState(
+          transform
+            ? transform(keys)
+            : keys as unknown as T[]
+        )).catch(console.error);
+      }
+    }
+  }, [at, entry, params, transform]);
+
+  return state;
+}