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-contracts/src/useContracts.ts

@@ -0,0 +1,46 @@
+// Copyright 2017-2025 @pezkuwi/react-hooks authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import { useEffect, useState } from 'react';
+
+import { createNamedHook, useIsMountedRef } from '@pezkuwi/react-hooks';
+import { keyring } from '@pezkuwi/ui-keyring';
+import { nextTick } from '@pezkuwi/util';
+
+interface UseContracts {
+  allContracts: string[];
+  hasContracts: boolean;
+  isContract: (address: string) => boolean;
+}
+
+const DEFAULT_STATE: UseContracts = {
+  allContracts: [],
+  hasContracts: false,
+  isContract: () => false
+};
+
+function useContractsImpl (): UseContracts {
+  const mountedRef = useIsMountedRef();
+  const [state, setState] = useState<UseContracts>(DEFAULT_STATE);
+
+  useEffect((): () => void => {
+    const subscription = keyring.contracts.subject.subscribe((contracts): void => {
+      if (mountedRef.current) {
+        const allContracts = contracts ? Object.keys(contracts) : [];
+        const hasContracts = allContracts.length !== 0;
+        const isContract = (address: string) => allContracts.includes(address);
+
+        setState({ allContracts, hasContracts, isContract });
+      }
+    });
+
+    return (): void => {
+      nextTick(() => subscription.unsubscribe());
+    };
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
+  return state;
+}
+
+export const useContracts = createNamedHook('useContracts', useContractsImpl);