Add a quick README

README.md

@@ -1,2 +1,7 @@
-# httptoolkit-js-util
-A tiny utility package, sharing JS code widely used across HTTP Toolkit projects
+# @httptoolkit/util [![Build Status](https://github.com/httptoolkit/httptoolkit-js-util/workflows/CI/badge.svg)](https://github.com/httptoolkit/httptoolkit-js-util/actions) [![Available on NPM](https://img.shields.io/npm/v/@httptoolkit/util.svg)](https://npmjs.com/package/@httptoolkit/util)
+
+> _Part of [HTTP Toolkit](https://httptoolkit.com): powerful tools for building, testing & debugging HTTP(S)_
+
+A tiny utility package, sharing JS code widely used across HTTP Toolkit projects.
+
+You're welcome to use this if you like, but be aware that this is only intended for internal use, so there may be frequent breaking changes and support for external usage will be limited.