Add CI workflow for linting and testing

.github/workflows/ci.yml

@@ -0,0 +1,44 @@
+name: CI for Linting and Testing
+
+# Run the workflow on push and pull requests
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    # Step 1: Checkout the repository
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    # Step 2: Set up Python
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.9'
+
+    # Step 3: Install dependencies
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -e .[dev]
+
+    # Step 4: Run flake8 for linting
+    - name: Lint with flake8
+      run: |
+        flake8 --ignore=E501,E203,W503 protlib_designer scripts
+
+    # Step 5: Check formatting with black
+    - name: Check formatting with black
+      run: |
+        black --check -S -t py39 protlib_designer scripts
+
+    # Step 6: Run tests with pytest
+    - name: Run tests with pytest
+      run: |
+        pytest