Initial rebrand: @polkadot -> @pezkuwi (3 packages)

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

Packages:
- @pezkuwi/dev (build tools, linting, CI scripts)
- @pezkuwi/dev-test (test runner)
- @pezkuwi/dev-ts (TypeScript build)

Upstream: polkadot-js/dev v0.83.3

packages/dev/src/root.ts

@@ -0,0 +1,6 @@
+// Copyright 2017-2025 @polkadot/dev authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+export * from './rootJs/index.js';
+
+export const TEST_PURE = /*#__PURE__*/ 'testRoot';