add workflow to check Python API on Ubuntu

.github/workflows/actions.yml

@@ -31,6 +31,18 @@ jobs:
       - name: check TREXIO
         run: make check
 
+      - name: create virtual environment
+        run: | 
+          python3 -m venv --clear pytrexio-venv
+          source pytrexio-venv/bin/activate
+      
+      - name: install Python API
+        run: make python-install
+        # alternatively we can also run pip install trexio to check PyPI installation
+
+      - name: check Python API
+        run: make python-test
+
       - name: clean
         run: make clean