feat: initial Pezkuwi Apps rebrand from polkadot-apps

Rebranded terminology:
- Polkadot → Pezkuwi
- Kusama → Dicle
- Westend → Zagros
- Rococo → PezkuwiChain
- Substrate → Bizinikiwi
- parachain → teyrchain

Custom logos with Kurdistan brand colors (#e6007a → #86e62a):
- bizinikiwi-hexagon.svg
- sora-bizinikiwi.svg
- hezscanner.svg
- heztreasury.svg
- pezkuwiscan.svg
- pezkuwistats.svg
- pezkuwiassembly.svg
- pezkuwiholic.svg

packages/react-components/src/Button/Group.tsx

@@ -0,0 +1,53 @@
+// Copyright 2017-2025 @pezkuwi/react-components authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import React from 'react';
+
+import { styled } from '../styled.js';
+
+interface Props {
+  children?: React.ReactNode;
+  className?: string;
+  isCentered?: boolean;
+}
+
+function ButtonGroup ({ children, className = '', isCentered }: Props): React.ReactElement<Props> {
+  return (
+    <StyledDiv className={`${className} ui--Button-Group ${isCentered ? 'isCentered' : ''}`}>
+      {children}
+      <div className='clear' />
+    </StyledDiv>
+  );
+}
+
+const StyledDiv = styled.div`
+  margin: 1rem 0;
+  text-align: right;
+
+  & .clear {
+    clear: both;
+  }
+
+  &.isCentered {
+    margin-bottom: 0.5rem;
+    text-align: center;
+  }
+
+  &+.ui--Table {
+    margin-top: 1.5rem;
+  }
+
+  .ui--Button {
+    margin: 0 0.25rem;
+  }
+
+  .ui--CopyButton {
+    display: inline-block;
+  }
+
+  .ui--ToggleGroup, .ui--Dropdown {
+    float: left;
+  }
+`;
+
+export default React.memo(ButtonGroup);