ci(site): add GitHub Actions workflow for Hugo build and deploy

Author: dndungu

.github/workflows/hugo.yml

@@ -0,0 +1,52 @@
+name: Deploy Hugo site to Pages
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Setup Hugo
+        uses: peaceiris/actions-hugo@v3
+        with:
+          hugo-version: '0.159.0'
+          extended: true
+
+      - name: Install Dart Sass
+        run: sudo snap install dart-sass
+
+      - name: Build
+        run: hugo --minify
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./public
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment: github-pages
+    permissions:
+      pages: write
+      id-token: write
+    steps:
+      - name: Deploy to GitHub Pages
+        uses: actions/deploy-pages@v4