Add workflow to build and deploy documentation

Author: Icíar Lloréns Jover

.github/workflows/docs_publish.yaml

@@ -0,0 +1,43 @@
+# This workflow will build and publish the documentation to the `gh-pages` branch of the
+# repository when a new tag is added.
+# It uses the `peaceiris/actions-gh-pages` action to handle the publishing.
+#
+# Copyright (c) 2025 MeteoSwiss, based on the workflow created by Michele Cattaneo; michele.cattaneo@meteoswiss.ch
+
+name: docs_publish
+
+on:
+  push:
+    branches: ['main']
+
+jobs:
+
+  docs:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout current repository
+      uses: actions/checkout@v4
+
+    - name: Set up Python 3.12
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.12
+
+    - name: Install poetry and python package
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install poetry
+        poetry install
+
+    - name: Build documentation
+      run: poetry run sphinx-build doc doc/_build
+    
+    - name: Publish documentation
+      uses: peaceiris/actions-gh-pages@v3
+
+      with:
+        publish_branch: gh-pages
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: doc/_build/
+        force_orphan: true