docs: 👀 add readme

Author: timkinnane

README.md

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+Centralised config of dev tooling for Nested Code packages.
+
+---
+
+The goal for this project is to support simple and consistent package config across a variety of
+platforms and interfaces (CLIs, Node/Deno, browser).
+
+One choice I've made to achieve that is to publish exclusively as ES modules (mostly using
+Typescript, for Node 14). Narrowing support to ESM (not publishing Common JS) supports not just
+simplicity but a forward looking JS ecosystem.
+
+[Start here if you're wondering why or how to support ESM](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c).
+
+### Configs
+
+- [ ] ESBuild script to:
+  - [ ] Lint
+  - [ ] Build and bundle
+  - [ ] Write type definitions
+  - [ ] Update package exports
+- [ ] TSConfig
+- [ ] ESLint config
+- [ ] Jest config