add workflow to publish docs

.github/workflows/publish_docs.yml

@@ -0,0 +1,43 @@
+name: Deploy Document with GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Pages
+        uses: actions/configure-pages@v3
+      - uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: 7.0.x
+      - run: dotnet tool restore
+      - name: Build docs
+        run: make docs/build
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: docs
+          path: docs/_site
+  deploy:
+    permissions:
+      id-token: write
+      pages: write
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: peaceiris/actions-gh-pages@v3

Makefile

@@ -34,3 +34,7 @@ plugins/build:
 .PHONY: docs/clean
 docs/clean:
 	rm -rf ./docs/_site
+
+.PHONY: docs/build
+docs/build:
+	dotnet docfx docs/docfx.json