Add coverage

.github/workflows/coverage.yaml

@@ -0,0 +1,42 @@
+name: Coverage
+
+on: push
+jobs:
+  run-radicalpy-coverage:
+    name: Run coverage on RadicalPy
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Set up Python "3.11" 🐍
+      uses: actions/setup-python@v4
+      with:
+        python-version: "3.11"
+        cache: 'pip'
+    - name: Install packages 📦
+      run: >-
+        python -m
+        pip install -r requirements.txt
+    - name: Install coverage
+      run: >-
+        python -m
+        pip install coverage
+    - name: Reset coverage
+      run: >-
+        coverage erase
+    - name: Run coverage
+      run: >-
+        coverage run -a python -m
+        unittest
+        discover -v
+    - name: Run examples
+      run: >-
+        for file in $(ls examples/*.py); do
+          PYTHONPATH=. coverage run -a python $file --fast
+        done
+    - name: Create report
+      run: >-
+        coverage report && coverage xml && ls -lrt
+    # - name: Code Coverage Report
+    #   uses: irongut/CodeCoverageSummary@v1.3.0
+    #   with:
+    #     filename: coverage/**/coverage.cobertura.xml