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/assert.spec.ts

@@ -0,0 +1,40 @@
+// Copyright 2017-2025 @polkadot/util authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/// <reference types="@polkadot/dev-test/globals.d.ts" />
+
+import { assert, assertReturn } from './index.js';
+
+describe('assert', (): void => {
+  it('should not throw an error when test is true', (): void => {
+    assert(true, 'nothing should be thrown');
+  });
+
+  it('should throw an error when test is not true', (): void => {
+    expect(
+      () => assert(false, 'error thrown')
+    ).toThrow(/error thrown/);
+  });
+
+  it('should throw an error when message: () => string', (): void => {
+    expect(
+      () => assert(false, (): string => 'message from function')
+    ).toThrow(/message from function/);
+  });
+});
+
+describe('assertReturn', (): void => {
+  it('should not throw an error when result is true', (): void => {
+    expect(assertReturn(true, 'nothing should be thrown')).toEqual(true);
+  });
+
+  it('should not throw an error when result is false', (): void => {
+    expect(assertReturn(false, 'nothing should be thrown')).toEqual(false);
+  });
+
+  it('should throw an error when result is undefined', (): void => {
+    expect(
+      () => assertReturn(undefined, 'something thrown')
+    ).toThrow(/something thrown/);
+  });
+});