Add deploy docs workflow

.github/workflows/deploy-docs.yml

@@ -0,0 +1,41 @@
+name: Deploy Docs
+
+on:
+  release:
+    types:
+      - published
+
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  build-and-deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          path: ./dragon_skeleton
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+      - uses: kfischer-okarin/download-dragonruby@v1
+      - name: Build Docs
+        working-directory: ./dragon_skeleton
+        run: rdoc -V lib
+      - name: Generate images
+        run: xvfb-run ./dragonruby dragon_skeleton --eval app/generate_easing_images.rb
+      - name: Upload gartifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./dragon_skeleton/doc
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4