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-bigint/package.json

@@ -0,0 +1,26 @@
+{
+  "author": "Jaco Greeff <jacogr@gmail.com>",
+  "bugs": "https://github.com/pezkuwichain/pezkuwi-common/issues",
+  "description": "A cross-environment BigInt replacement",
+  "engines": {
+    "node": ">=18"
+  },
+  "homepage": "https://github.com/pezkuwichain/pezkuwi-common/tree/master/packages/x-bigint#readme",
+  "license": "Apache-2.0",
+  "name": "@pezkuwi/x-bigint",
+  "repository": {
+    "directory": "packages/x-bigint",
+    "type": "git",
+    "url": "https://github.com/pezkuwichain/pezkuwi-common.git"
+  },
+  "sideEffects": [
+    "./shim.js",
+    "./shim.cjs"
+  ],
+  "type": "module",
+  "version": "14.0.1",
+  "dependencies": {
+    "@pezkuwi/x-global": "14.0.1",
+    "tslib": "^2.8.0"
+  }
+}