Copy docs from C++ libloot

.github/workflows/ci.yml

@@ -159,6 +159,26 @@ jobs:
         working-directory: cpp
         run: ctest --test-dir build --build-config ${{ env.CMAKE_CONFIG }} --output-on-failure --parallel
 
+      - name: Install packages for building docs (Linux)
+        working-directory: cpp
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-upgrade doxygen
+          pip3 install --user -r docs/requirements.txt
+        if: runner.os == 'Linux'
+
+      - name: Install packages for building docs (Windows)
+        working-directory: cpp
+        run: |
+          nuget install doxygen -Version 1.8.14
+          echo "${{ github.workspace }}\Doxygen.1.8.14\tools" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          python -m pip install -r docs/requirements.txt
+        if: runner.os == 'Windows'
+
+      - name: Build docs
+        working-directory: cpp
+        run: sphinx-build -b html docs build/docs/html
+
       - name: Package the C++ wrapper
         working-directory: cpp/build
         run: cpack -C ${{ env.CMAKE_CONFIG }}