Add API docs to website

.github/workflows/gh-pages.yaml

@@ -0,0 +1,49 @@
+name: Publish GitHub Pages
+
+on:
+  workflow_dispatch:
+  workflow_run:
+    workflows: [Publish NuGet Package]
+    types:
+      - completed
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+           submodules: 'true'
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 9.0.x
+
+      - name: Build documentation
+        run: dotnet run --project src/CsvHelper.Website/
+
+      - name: Upload documentation
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: 'src/CsvHelper.Website/output'
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4