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/InputStorage/SelectKey.tsx

@@ -0,0 +1,54 @@
+// Copyright 2017-2025 @polkadot/react-components authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { ApiPromise } from '@polkadot/api';
+import type { QueryableStorageEntry } from '@polkadot/api/types';
+import type { DropdownOptions } from '../util/types.js';
+
+import React from 'react';
+
+import { useApi } from '@polkadot/react-hooks';
+
+import Dropdown from '../Dropdown.js';
+import { filterDropdownItems } from '../util/index.js';
+
+interface Props {
+  className?: string;
+  isError?: boolean;
+  onChange: (value: QueryableStorageEntry<'promise'>) => void;
+  options: DropdownOptions;
+  value: QueryableStorageEntry<'promise'>;
+}
+
+function transform (api: ApiPromise, { value }: Props): (method: string) => QueryableStorageEntry<'promise'> {
+  return function (method: string): QueryableStorageEntry<'promise'> {
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-return
+    return api.query[value.creator.section]
+      ? api.query[value.creator.section][method] as any
+      : value;
+  };
+}
+
+function SelectKey (props: Props): React.ReactElement<Props> | null {
+  const { api } = useApi();
+  const { className = '', isError, onChange, options, value } = props;
+
+  if (!options.length) {
+    return null;
+  }
+
+  return (
+    <Dropdown
+      className={`${className} ui--DropdownLinked-Items`}
+      isError={isError}
+      onChange={onChange}
+      onSearch={filterDropdownItems}
+      options={options}
+      transform={transform(api, props)}
+      value={value.creator.method}
+      withLabel={false}
+    />
+  );
+}
+
+export default React.memo(SelectKey);