Update README & add automated build check

Author: Pwuts

.github/workflows/checks.yml

@@ -0,0 +1,24 @@
+name: Checks
+
+on:
+  push:
+    paths:
+      - 'src/**'
+      - 'tsconfig.json'
+      - 'package.json'
+      - 'yarn.lock'
+  pull_request:
+
+jobs:
+  build:
+    name: Build test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{github.event.pull_request.head.sha}}
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - run: yarn install --frozen-lockfile
+      - run: yarn build

README.md

@@ -1,4 +1,10 @@
 # MCH2022 WebUSB API library
+![latest NPM release](https://img.shields.io/npm/v/@badge.team/badge-webusb?style=flat-square)
+![bundle size](https://img.shields.io/bundlephobia/min/@badge.team/badge-webusb?style=flat-square)
+![license](https://img.shields.io/github/license/badgeteam/mch2022-webusb-lib?style=flat-square)
+
+This library allows easy WebUSB communication with the MCH2022 badge, and possibly
+more badges in the future.
 
 ## Endpoints
 ```TS
@@ -40,3 +46,13 @@ interface BadgeAPI {
 }
 ```
 TODO: auto generated docs :)
+
+## Credits
+* Renze Nicolai (@renzenicolai): WebUSB implementation (firmware + JS client)
+* Reinier van der Leer (@Pwuts): TypeScript conversion & documentation
+
+## References
+* [WebUSB implementation] in the MCH2022 badge firmware
+* [MDN WebUSB API spec](https://developer.mozilla.org/en-US/docs/Web/API/WebUSB_API)
+
+[WebUSB implementation]: https://github.com/badgeteam/mch2022-firmware-esp32/blob/master/main/webusb.c