Modify Jekyll workflow for multilingual support

Updated Jekyll workflow to include multilingual support and adjust deployment steps.

Author: vongomben

.github/workflows/jekyll.yml

@@ -0,0 +1,47 @@
+# Build Jekyll con tutti i plugin (incluso multilingua in _plugins) e pubblica su GitHub Pages
+name: Jekyll build and deploy
+
+on:
+  push:
+    branches: ["main", "master"]
+
+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
+
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.1'
+          bundler-cache: true
+
+      - name: Build with Jekyll (inclusi plugin in _plugins)
+        run: bundle exec jekyll build
+
+      - name: Upload artifact per GitHub Pages
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: _site
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy su GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4