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/rootJs/Jsx.tsx

@@ -0,0 +1,45 @@
+// Copyright 2017-2025 @polkadot/dev authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// Adapted from https://github.com/testing-library/react-testing-library#basic-example
+
+import type { Props } from './JsxChild.js';
+
+import React, { useCallback, useState } from 'react';
+import { styled } from 'styled-components';
+
+import Child from './JsxChild.js';
+
+function Hidden ({ children, className }: Props): React.ReactElement<Props> {
+  const [isMessageVisible, setMessageVisibility] = useState(false);
+
+  const onShow = useCallback(
+    (e: React.ChangeEvent<HTMLInputElement>) =>
+      setMessageVisibility(e.target.checked),
+    []
+  );
+
+  return (
+    <StyledDiv className={className}>
+      <label htmlFor='toggle'>Show Message</label>
+      <input
+        checked={isMessageVisible}
+        id='toggle'
+        onChange={onShow}
+        type='checkbox'
+      />
+      {isMessageVisible && (
+        <>
+          {children}
+          <Child label='hello' />
+        </>
+      )}
+    </StyledDiv>
+  );
+}
+
+const StyledDiv = styled.div`
+  background: red;
+`;
+
+export default React.memo(Hidden);