Add CI for FORD

.github/workflows/doc.yml

@@ -0,0 +1,43 @@
+name: doc
+on: [push]
+jobs:
+
+  Build:
+    runs-on: ${{ matrix.os }}
+    permissions:
+      contents: write
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        python-version: [3.12]
+
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Install Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Setup Graphviz
+      uses: ts-graphviz/setup-graphviz@v1
+
+    - name: Install FORD
+      if: contains( matrix.os, 'ubuntu')
+      run: |
+        python -m pip install --upgrade pip
+        pip install ford
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+
+    - name: Build FORD Documentation
+      run: ford ./ford.yml
+
+    - name: Deploy Documentation
+      uses: JamesIves/github-pages-deploy-action@v4.4.3
+      with:
+        branch: gh-pages
+        folder: doc