Implement a PR deploy preview

Author: swt2c

.github/workflows/preview.yml

@@ -0,0 +1,25 @@
+name: Deploy preview
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - closed
+
+jobs:
+  publish-website:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Build website
+        uses: ./.github/actions/build-website
+        if: github.event.action != 'closed'
+
+      - name: Deploy preview
+        uses: rossjrw/pr-preview-action@v1
+        with:
+          source-dir: output