Apply Prettier to the entire project

This ensures that our tests will be formatted by Prettier, among other things.

.github/workflows/netlify-main.yaml

@@ -21,7 +21,7 @@ jobs:
           env: main-branch-cd
           ref: ${{ github.event.workflow_run.head_sha }}
 
-      - name: 'Download artifact'
+      - name: "Download artifact"
         uses: actions/github-script@v3.1.0
         with:
           script: |