First attempt at automated Playwright tests (#402)

* First attempt at automated Playwright tests

* Fix deb installation in CI

* Try again with .deb

* Try xvfb

* Fix paths

* Prepare macOS runner for UI tests

* test_artifacts

* Increase test timeout to 30s

* Add timeout

* Split out build & test stages for easier retrying

* Use a single test matrix job

* Fix testing

* Yarn install

* Install deps

* Make prep more generic

* Update build.yaml

* Update build.yaml

* Update build.yaml

babel.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+    presets: [
+        ['@babel/preset-env', { targets: { node: 'current' } }],
+        '@babel/preset-typescript',
+    ],
+};