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/string/index.ts

@@ -0,0 +1,12 @@
+// Copyright 2017-2025 @polkadot/util authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/**
+ * @summary Utility methods to convert to work with `string` values
+ */
+
+export { stringCamelCase, stringPascalCase } from './camelCase.js';
+export { stringLowerFirst, stringUpperFirst } from './lowerFirst.js';
+export { stringShorten } from './shorten.js';
+export { stringToHex } from './toHex.js';
+export { stringToU8a } from './toU8a.js';