Initial rebrand: @polkadot -> @pezkuwi (14 packages)

- Package namespace: @polkadot/* -> @pezkuwi/*
- Repository: polkadot-js/common -> pezkuwichain/pezkuwi-common
- Author: Pezkuwi Team <team@pezkuwichain.io>

Core packages:
- @pezkuwi/util (utilities)
- @pezkuwi/util-crypto (crypto primitives)
- @pezkuwi/keyring (account management)
- @pezkuwi/networks (chain metadata)
- @pezkuwi/hw-ledger (Ledger hardware wallet)
- @pezkuwi/x-* (10 polyfill packages)

Total: 14 packages
Upstream: polkadot-js/common v14.0.1

packages/util/src/promisify.ts

@@ -0,0 +1,30 @@
+// Copyright 2017-2025 @polkadot/util authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+/**
+ * @name promisify
+ * @summary Wraps an async callback into a `Promise`
+ * @description
+ * Wraps the supplied async function `fn` that has a standard JS callback `(error: Error, result: any)` into a `Promise`, passing the supplied parameters. When `error` is set, the Promise is rejected, else the Promise resolves with the `result` value.
+ * @example
+ * <BR>
+ *
+ * ```javascript
+ * const { promisify } from '@pezkuwi/util';
+ *
+ * await promisify(null, ((a, cb) => cb(null, a), true); // resolves with `true`
+ * await promisify(null, (cb) => cb(new Error('error!'))); // rejects with `error!`
+ * ```
+ */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export function promisify <R = any> (self: unknown, fn: (...params: any[]) => any, ...params: any[]): Promise<R> {
+  return new Promise((resolve, reject): void => {
+    fn.apply(self, params.concat((error: Error | null, result?: R): void => {
+      if (error) {
+        reject(error);
+      } else {
+        resolve(result as R);
+      }
+    }));
+  });
+}