Add GitHub Pages PR preview deployment workflow

.github/workflows/github-pages-preview.yml

@@ -0,0 +1,57 @@
+name: Deploy PR Preview to GitHub Pages
+
+on:
+  pull_request:
+    branches: ["main"]
+    types: [opened, synchronize, reopened, ready_for_review]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages-preview-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm clean-install --progress=false
+
+      - name: Build
+        env:
+          BASE_PATH: /${{ github.event.repository.name }}/
+        run: npm run build:pages
+
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: dist
+
+  deploy:
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages preview
+        id: deployment
+        uses: actions/deploy-pages@v4
+        with:
+          preview: true