feat: initial Pezkuwi Apps rebrand from polkadot-apps

Rebranded terminology:
- Polkadot → Pezkuwi
- Kusama → Dicle
- Westend → Zagros
- Rococo → PezkuwiChain
- Substrate → Bizinikiwi
- parachain → teyrchain

Custom logos with Kurdistan brand colors (#e6007a → #86e62a):
- bizinikiwi-hexagon.svg
- sora-bizinikiwi.svg
- hezscanner.svg
- heztreasury.svg
- pezkuwiscan.svg
- pezkuwistats.svg
- pezkuwiassembly.svg
- pezkuwiholic.svg

packages/react-hooks/src/useBestHash.ts

@@ -0,0 +1,20 @@
+// Copyright 2017-2025 @pezkuwi/react-hooks authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { Header } from '@pezkuwi/types/interfaces';
+
+import { createNamedHook } from './createNamedHook.js';
+import { useApi } from './useApi.js';
+import { useCall } from './useCall.js';
+
+const OPT = {
+  transform: (header: Header) => header.hash.toHex()
+};
+
+function useBestHashImpl (): string | undefined {
+  const { api } = useApi();
+
+  return useCall<string>(api.rpc.chain.subscribeNewHeads, undefined, OPT);
+}
+
+export const useBestHash = createNamedHook('useBestHash', useBestHashImpl);