add doxygen and his gh page

.github/workflows/docs.yml

@@ -0,0 +1,33 @@
+name: Doxygen GitHub Pages Deploy Action
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4.1.1
+        with:
+          submodules: "true"
+      - name: Install Doxygen
+        run: |
+          sudo apt-get install graphviz doxygen
+          wget https://www.doxygen.nl/files/doxygen-1.11.0.linux.bin.tar.gz
+          tar -xzf doxygen-*.linux.bin.tar.gz
+      - name: Generate Doxygen documentation
+        run: |
+          ./doxygen-*/bin/doxygen Doxyfile
+        
+      - name: Create .nojekyll (ensures pages with underscores work on gh pages)
+        run: touch docs/html/.nojekyll
+        
+      - name: Deploy to GitHub Pages
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          branch: gh-pages
+          folder: docs/html