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/ed25519/pair/fromString.ts

@@ -0,0 +1,31 @@
+// Copyright 2017-2025 @polkadot/util-crypto authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { Keypair } from '../../types.js';
+
+import { stringToU8a } from '@pezkuwi/util';
+
+import { blake2AsU8a } from '../../blake2/asU8a.js';
+import { ed25519PairFromSeed } from './fromSeed.js';
+
+/**
+ * @name ed25519PairFromString
+ * @summary Creates a new public/secret keypair from a string.
+ * @description
+ * Returns a object containing a `publicKey` & `secretKey` generated from the supplied string. The string is hashed and the value used as the input seed.
+ * @example
+ * <BR>
+ *
+ * ```javascript
+ * import { ed25519PairFromString } from '@pezkuwi/util-crypto';
+ *
+ * ed25519PairFromString('test'); // => { secretKey: [...], publicKey: [...] }
+ * ```
+ */
+export function ed25519PairFromString (value: string): Keypair {
+  return ed25519PairFromSeed(
+    blake2AsU8a(
+      stringToU8a(value)
+    )
+  );
+}