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/useOutsideClick.ts

@@ -0,0 +1,36 @@
+// Copyright 2017-2025 @polkadot/react-hooks authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type React from 'react';
+
+import { useCallback, useEffect } from 'react';
+
+import { createNamedHook } from './createNamedHook.js';
+
+function isRefClicked (refs: React.RefObject<HTMLDivElement>[], e: MouseEvent): boolean {
+  return refs.some((r) =>
+    r.current &&
+    r.current.contains(e.target as HTMLElement)
+  );
+}
+
+function useOutsideClickImpl (refs: React.RefObject<HTMLDivElement>[], callback: () => void): void {
+  const handleClick = useCallback(
+    (e: MouseEvent): void => {
+      if (refs.length && !isRefClicked(refs, e)) {
+        callback();
+      }
+    },
+    [refs, callback]
+  );
+
+  useEffect((): () => void => {
+    document.addEventListener('click', handleClick, true);
+
+    return (): void => {
+      document.removeEventListener('click', handleClick, true);
+    };
+  }, [handleClick, callback]);
+}
+
+export const useOutsideClick = createNamedHook('useOutsideClick', useOutsideClickImpl);