refactor: rebase this on redesign branch of the other website

.github/workflows/gh-jekyll-workflow.yml

@@ -0,0 +1,64 @@
+# Sample workflow for building and deploying a Jekyll site to GitHub Pages
+name: Deploy Jekyll with GitHub Pages dependencies preinstalled
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["main", "redesign"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+          bundler-cache: false 
+      - name: Install dependencies
+        run: bundle install
+      - name: Build with Jekyll (with custom plugins)
+        run: bundle exec jekyll build --trace
+        env:
+          JEKYLL_ENV: production
+      - name: Check JavaScript
+        run: |
+          node --check assets/js/extra.js
+          node tests/shop-js-test.js
+      - name: Check generated HTML and internal links
+        run: bundle exec htmlproofer ./_site --disable-external
+      - name: Verify Shop output and source invariants
+        run: bundle exec ruby tools/verify-site.rb ./_site
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v5

.github/workflows/site-checks.yml

@@ -0,0 +1,31 @@
+name: Site checks
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: false
+          ruby-version: "3.3"
+      - name: Install dependencies
+        run: bundle install
+      - name: Check JavaScript
+        run: |
+          node --check assets/js/extra.js
+          node tests/shop-js-test.js
+      - name: Build site
+        run: bundle exec jekyll build
+      - name: Check generated HTML and internal links
+        run: bundle exec htmlproofer ./_site --disable-external
+      - name: Verify Shop output and source invariants
+        run: bundle exec ruby tools/verify-site.rb ./_site