Initial rebrand: @polkadot -> @pezkuwi (14 packages)

- Package namespace: @polkadot/* -> @pezkuwi/*
- Repository: polkadot-js/common -> pezkuwichain/pezkuwi-common
- Author: Pezkuwi Team <team@pezkuwichain.io>

Core packages:
- @pezkuwi/util (utilities)
- @pezkuwi/util-crypto (crypto primitives)
- @pezkuwi/keyring (account management)
- @pezkuwi/networks (chain metadata)
- @pezkuwi/hw-ledger (Ledger hardware wallet)
- @pezkuwi/x-* (10 polyfill packages)

Total: 14 packages
Upstream: polkadot-js/common v14.0.1

packages/util/src/array/unzip.ts

@@ -0,0 +1,18 @@
+// Copyright 2017-2025 @polkadot/util authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/**
+ * @name arrayUnzip
+ * @description Splits a single [K, V][] into [K[], V[]]
+ */
+export function arrayUnzip <K, V> (entries: readonly [K, V][]): [K[], V[]] {
+  const count = entries.length;
+  const keys = new Array<K>(count);
+  const values = new Array<V>(count);
+
+  for (let i = 0; i < count; i++) {
+    [keys[i], values[i]] = entries[i];
+  }
+
+  return [keys, values];
+}