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/x-randomvalues/src/fallback.ts

@@ -0,0 +1,28 @@
+// Copyright 2017-2025 @polkadot/x-randomvalues authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// Adapted from https://github.com/LinusU/react-native-get-random-values/blob/85f48393821c23b83b89a8177f56d3a81dc8b733/index.js
+//
+// Copyright (c) 2018, 2020 Linus Unnebäck
+// SPDX-License-Identifier: MIT
+
+let warned = false;
+
+export function insecureRandomValues <T extends Uint8Array> (arr: T): T {
+  if (!warned) {
+    console.warn('Using an insecure random number generator, this should only happen when running in a debugger without support for crypto');
+    warned = true;
+  }
+
+  let r = 0;
+
+  for (let i = 0, count = arr.length; i < count; i++) {
+    if ((i & 0b11) === 0) {
+      r = Math.random() * 0x100000000;
+    }
+
+    arr[i] = (r >>> ((i & 0b11) << 3)) & 0xff;
+  }
+
+  return arr;
+}