Add README

README.md

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+<h1 align="center">minitest</h1>
+<p align="center">
+    <a href="https://github.com/sondr3/minitest/actions"><img alt="GitHub Actions Status" src="https://github.com/sondr3/minitest/workflows/pipeline/badge.svg" /></a>
+    <a href="https://www.npmjs.com/package/@sondr3/minitest"><img alt="NPM" src="https://badge.fury.io/js/%40sondr3%2Fminitest.svg" /></a>
+</p>
+
+<p align="center">
+    <b>A low-feature and performant test runner inspired by Rust and Deno</b>
+</p>
+
+- **Simplicity**: Use the `mt` test runner with the `test` function, nothing more.
+- **Performance**: By doing less we can run more faster.
+- **Minimal**: Bring your own assertions, snapshots, `mt` will never be more than it is.
+
+<details>
+<summary>Table of Contents</summary>
+<br />
+
+## Table of Contents
+
+- [Quickstart](#quickstart)
+- [Getting started](#getting-started)
+- [License](#license)
+</details>
+
+# Quickstart
+
+1. Install via `npm`/`yarn`/`pnpm`: `yarn add --dev @sondr3/minitest`
+2. Add a test script to `package.json`: `"test": "mt <dir>"`
+3. Write your tests, any file ending with `.test.js` or named `test.js` are valid:
+
+   ```js
+   import { strict as assert } from "assert";
+   import { test } from "@sondr3/minitest";
+
+   test("it works!", () => {
+     assert(true === true, "Phew");
+   });
+   ```
+
+4. Run your tests: `yarn test`
+
+   ```text
+   running 1 test
+   running 1 test in dir/index.test.js
+   test  it works! ... ok
+
+   test result: ok. 1 passed; 0 failed; 0 ignored; 0 filtered out; finished in 32ms
+   ```
+
+# Getting started
+
+TODO
+
+# License
+
+MIT.