👷(pages) add Github Pages deployment config

Configuration proposed in slidev official documentation¹

¹:https://sli.dev/guide/hosting.html#github-pages

.github/workflows/deploy.yaml

@@ -0,0 +1,44 @@
+name: Deploy pages
+
+on:
+  workflow_dispatch: {}
+  push:
+    branches:
+        - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 'lts/*'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build
+        run: npm run build -- --base /2024-quartier-numerique-tdbp/
+
+      - uses: actions/configure-pages@v4
+
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: dist
+
+      - name: Deploy
+        id: deployment
+        uses: actions/deploy-pages@v4
+