Implement GitHub Pages CI workflow

Author: ahmetsait

.github/workflows/main.yml

@@ -0,0 +1,91 @@
+name: Deploy Jekyll site to Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: [master]
+
+  # 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:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          cache: 'npm'
+
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3' # Not needed with a `.ruby-version` or `.tool-versions`
+          bundler-cache: true # runs 'bundler install' and caches installed gems automatically
+          cache-version: 0 # Increment this number if you need to re-download cached gems
+
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v5
+
+      - name: Fetch ImageMagick ETag
+        id: fetch-magick-etag
+        run: |
+          echo "etag=$(./fetch-magick-etag.sh)" >> "$GITHUB_OUTPUT"
+
+      - name: Restore ImageMagick
+        id: restore-magick
+        uses: actions/cache@v4
+        with:
+          path: |
+            bin/magick
+            bin/magick-etag
+          key: magick-${{ steps.fetch-magick-etag.outputs.etag }}
+
+      - name: Fetch Inkscape version
+        id: fetch-inkscape-version
+        run: |
+          echo "version=$(./fetch-inkscape-version.sh)" >> "$GITHUB_OUTPUT"
+
+      - name: Restore Inkscape
+        id: restore-inkscape
+        uses: actions/cache@v4
+        with:
+          path: |
+            bin/inkscape
+            bin/inkscape-version
+          key: inkscape-${{ steps.fetch-inkscape-version.outputs.version }}
+
+      - name: Build
+        env:
+          JEKYLL_ENV: production
+        run: |
+          ./build.sh --fetch-deps --baseurl "${{ steps.pages.outputs.base_path }}"
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: build
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4