ci: add CI workflow for running tests and generating coverage report

- Add ci.yml to run tests on push and pull requests
- Set up Python environment and install dependencies
- Upgrade pip and setuptools
- Run tests with coverage report

Author: CynthiaWahome

.github/workflows/ci.yml

@@ -20,9 +20,12 @@ jobs:
         with:
           python-version: '3.9'
 
+      - name: Upgrade pip and setuptools
+        run: |
+          python -m pip install --upgrade pip setuptools
+
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
           pip install -r requirements.txt
 
       - name: Run tests