Set up Astro with GitHub Pages and migrate homepage from new-homepage branch

.github/workflows/deploy-site.yaml

@@ -0,0 +1,60 @@
+name: Deploy Site to GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    name: Build Astro site
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: npm
+          cache-dependency-path: site/package-lock.json
+
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v5
+
+      - name: Install dependencies
+        working-directory: site
+        run: npm ci
+
+      - name: Build with Astro
+        working-directory: site
+        run: npm run build
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: site/dist
+
+  deploy:
+    name: Deploy to GitHub Pages
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

@@ -1,6 +1,9 @@
 node_modules
 yarn-error.log
 dist
+site/node_modules
+site/dist
+site/.astro
 coverage
 .stryker-tmp
 reports