Rebrand: polkadot → pezkuwi build fixes

- Fixed TypeScript type assertion issues
- Updated imports from api-augment/substrate to api-augment/bizinikiwi
- Fixed imgConvert.mjs header and imports
- Added @ts-expect-error for runtime-converted types
- Fixed all @polkadot copyright headers to @pezkuwi

pezkuwi-sdk-ui/packages/test-support/scripts/lib/multiFunctions.ts

@@ -1,11 +1,11 @@
-// Copyright 2017-2025 @polkadot/test-support authors & contributors
+// Copyright 2017-2025 @pezkuwi/test-support authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import type { ApiPromise } from '@polkadot/api';
-import type { KeyringPair } from '@polkadot/keyring/types';
+import type { ApiPromise } from '@pezkuwi/api';
+import type { KeyringPair } from '@pezkuwi/keyring/types';
 
-import { execute } from '@polkadot/test-support/transaction';
-import { BN } from '@polkadot/util';
+import { execute } from '@pezkuwi/test-support/transaction';
+import { BN } from '@pezkuwi/util';
 
 import { waitForBountyState, waitForClaim } from './bountyWaitFunctions.js';
 import { FUNDING_TIME, PAYOUT_TIME } from './constants.js';