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/x-bundle/src/cjs/bn.js

@@ -0,0 +1,7 @@
+// Copyright 2017-2025 @polkadot/x-bundle authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// @ts-expect-error In dev mode we don't have export maps...
+const { BN } = require('@polkadot/util');
+
+module.exports = BN;

packages/x-bundle/src/cjs/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "commonjs"
+}