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

README.md

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+# @pezkuwi/common
+
+Various useful utility functions that are used across all projects in the [@pezkuwi](https://pezkuwi.js.org) namespace. It provides utility functions with additional safety checks, allowing not only for consistent coding, but also reducing the general boilerplate.
+
+## overview
+
+This repository is split up into a number of internal packages, namely utilities -
+
+- [keyring](packages/keyring/) Keyring management
+- [util](packages/util/) General utilities
+- [util-crypto](packages/util-crypto/) Crypto and hashing utilities
+
+## development
+
+Contributions are welcome!
+
+To start off, this repo (along with others in the [@pezkuwi](https://github.com/polkadot-js/) family) uses yarn workspaces to organise the code. As such, after cloning, its dependencies _should_ be installed via `yarn`, not via npm; the latter will result in broken dependencies.
+
+To get started -
+
+1. Clone the repo locally, via `git clone https://github.com/pezkuwichain/pezkuwi-common <optional local path>`
+2. Ensure that you have a recent version of Node.js, for development purposes [Node 10](https://nodejs.org/en/) is recommended.
+3. Ensure that you have a recent version of Yarn, for development purposes [Yarn >=1.10.1](https://yarnpkg.com/docs/install) is required.
+4. Install the dependencies by running `yarn`
+5. Build the everything via `yarn run build`
+6. You can also launch the API Docs, via `yarn vuepress dev docs`
+7. Access the docs via [http://localhost:8080](http://localhost:8080)
+
+## tutorials
+
+Looking for tutorials to get started? Look at [examples](https://pezkuwi.js.org/api/examples/keyring/) for guides on how to use the base utilities.