added a test workflow

.github/workflows/python-package.yml

@@ -0,0 +1,67 @@
+name: Python Package
+
+on:
+  push:
+    branches: [ main, master, development ]
+  pull_request:
+    branches: [ main, master ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.8, 3.9, "3.10", "3.11", "3.12"]
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install build pytest pytest-cov pytest-asyncio
+        pip install -e .
+        
+    - name: Run tests with coverage
+      run: |
+        pytest --cov=kew --cov-report=xml
+        
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v3
+      with:
+        file: ./coverage.xml
+        fail_ci_if_error: true
+
+  build:
+    needs: test
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: "3.12"
+
+    - name: Install build dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install build twine
+        
+    - name: Build package
+      run: python -m build
+
+    - name: Check package
+      run: twine check dist/*
+
+    - name: Store build artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: dist
+        path: dist/