Add GitHub actions for linting and testing

.github/workflows/ruff.yaml

@@ -0,0 +1,12 @@
+name: Linting
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: chartboost/ruff-action@v1

.github/workflows/unittest.yaml

@@ -0,0 +1,22 @@
+name: Tests
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+jobs:
+  unittest:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup Python
+      uses: actions/setup-python@v3
+      with:
+        python-version: "3.12"
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install homeassistant
+    - name: Run tests
+      run: |
+        python -m unittest discover -s tests/ -v