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/page-staking-legacy/src/Payouts/util.tsx

@@ -0,0 +1,60 @@
+// Copyright 2017-2025 @pezkuwi/app-staking authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { BN } from '@pezkuwi/util';
+
+import React from 'react';
+
+import { BN_ONE, formatNumber } from '@pezkuwi/util';
+
+function isSingle (entry: BN | [BN, BN]): entry is BN {
+  return !Array.isArray(entry);
+}
+
+export function createErasString (eras: BN[]): React.ReactNode {
+  if (!eras.length) {
+    return '';
+  }
+
+  const parts = eras
+    .sort((a, b) => a.cmp(b))
+    .reduce((result: (BN | [BN, BN])[], era): (BN | [BN, BN])[] => {
+      if (result.length === 0) {
+        return [era];
+      } else {
+        const last = result[result.length - 1];
+
+        if (isSingle(last)) {
+          if (last.add(BN_ONE).eq(era)) {
+            result[result.length - 1] = [last, era];
+          } else {
+            result.push(era);
+          }
+        } else {
+          if (last[1].add(BN_ONE).eq(era)) {
+            last[1] = era;
+          } else {
+            result.push(era);
+          }
+        }
+      }
+
+      return result;
+    }, [])
+    .map((entry) =>
+      isSingle(entry)
+        ? formatNumber(entry)
+        : `${formatNumber(entry[0])}-${formatNumber(entry[1])}`
+    );
+
+  return (
+    <>
+      {parts.map((section, index) => (
+        <React.Fragment key={section}>
+          {index !== 0 && ', '}
+          <span>{section}</span>
+        </React.Fragment>
+      ))}
+    </>
+  );
+}