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-crypto/src/nacl/encrypt.ts

@@ -0,0 +1,31 @@
+// Copyright 2017-2025 @polkadot/util-crypto authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import { randomAsU8a } from '../random/asU8a.js';
+import { naclSecretbox } from './tweetnacl.js';
+
+interface Encrypted {
+  encrypted: Uint8Array;
+  nonce: Uint8Array;
+}
+
+/**
+ * @name naclEncrypt
+ * @summary Encrypts a message using the supplied secretKey and nonce
+ * @description
+ * Returns an encrypted message, using the `secretKey` and `nonce`. If the `nonce` was not supplied, a random value is generated.
+ * @example
+ * <BR>
+ *
+ * ```javascript
+ * import { naclEncrypt } from '@pezkuwi/util-crypto';
+ *
+ * naclEncrypt([...], [...]); // => [...]
+ * ```
+ */
+export function naclEncrypt (message: Uint8Array, secret: Uint8Array, nonce: Uint8Array = randomAsU8a(24)): Encrypted {
+  return {
+    encrypted: naclSecretbox(message, nonce, secret),
+    nonce
+  };
+}