Research `node:test` and build a unit & e2e test infrastructure

[mikenikles]

Blocked by #366

#364 removed the .github/workflows/test.yml workflow with the following content. FYI in case this comes in handy:

Click to see code

name: Tests
on: pull_request
jobs:

tests:

name: Tests

runs-on: ubuntu-latest

steps:

- name: Checkout Repo

uses: actions/checkout@master
  - name: Setup Node.js
    uses: actions/setup-node@v3
    with:
      node-version: 16

  - name: Install pnpm globally
    run: npm install -g pnpm

  - name: Install Dependencies
    run: pnpm install --frozen-lockfile

  - name: Run all tests
    run: pnpm test