Add GitHub Pages documentation workflow

.github/workflows/documentation.yml

@@ -0,0 +1,57 @@
+name: Documentation
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: documentation
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: julia-actions/setup-julia@latest
+        with:
+          version: "1"
+
+      - uses: julia-actions/cache@v3
+
+      - name: Instantiate docs environment
+        run: julia --project=docs -e 'using Pkg; Pkg.instantiate()'
+
+      - name: Build documentation
+        run: julia --project=docs docs/make.jl
+
+      - if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: actions/configure-pages@v5
+
+      - if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: actions/upload-pages-artifact@v4
+        with:
+          path: docs/build
+
+  deploy:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    needs: build
+    permissions:
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - id: deployment
+        uses: actions/deploy-pages@v5