Add GH Action to build documentation

Author: sven-hoek

.github/workflows/doxygen-gh-pages.yml

@@ -0,0 +1,17 @@
+name: Doxygen GitHub Pages Deploy Action
+
+on:
+  push:
+    branches:
+      - main
+      - master
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: DenverCoder1/doxygen-github-pages-action@v2.0.0
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}