feat(build): add GitHub Actions workflow to deploy site on GitHub Pages

.github/workflows/pages.yml

@@ -0,0 +1,55 @@
+# Source: https://kit.svelte.dev/docs/adapter-static#github-pages
+
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches: 'main'
+
+jobs:
+  build_site:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9
+
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install
+
+      - name: Build
+        env:
+          BASE_PATH: '/${{ github.event.repository.name }}'
+        run: |
+          pnpm run build
+      - name: Upload Artifacts
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: 'build/'
+
+  deploy:
+    needs: build_site
+    runs-on: ubuntu-latest
+
+    permissions:
+      pages: write
+      id-token: write
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Deploy
+        id: deployment
+        uses: actions/deploy-pages@v4