Add python workflow and tests

This adds a very basic test that confirms that Python 3.11 is not supported.

.github/workflows/pythonpackages.yaml

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+name: Python package
+
+on:
+  push:
+  schedule:
+    - cron: "30 16 * * WED"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 4
+      matrix:
+        python-version: ["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 -r requirements.test.txt
+
+      - name: Run pytest
+        run: |
+          pytest

requirements.test.txt

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+-r requirements.txt
+
+coverage==7.5.0
+pytest==8.2.0
+pytest-cov==5.0.0
+pytest-aiohttp==1.0.5
+pytest-asyncio==0.23.6
+pytest-homeassistant-custom-component==0.13.132

setup.cfg

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+[tool:pytest]
+testpaths = tests
+norecursedirs = .git
+addopts =
+    --strict-markers
+    --cov=custom_components/teslafi
+filterwarnings=
+    ignore:.*plugin.py:pytest.PytestDeprecationWarning
+asyncio_mode = auto

tests/__init__.py

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+"""Tests for TeslaFi integration"""

tests/conftest.py

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+import pytest
+
+pytest_plugins = "pytest_homeassistant_custom_component"
+
+# This fixture enables loading custom integrations in all tests.
+# Remove to enable selective use of this fixture
+@pytest.fixture(autouse=True)
+def auto_enable_custom_integrations(enable_custom_integrations):
+    yield

tests/test_init.py

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+"""Test component setup."""
+
+from homeassistant.setup import async_setup_component
+
+from custom_components.teslafi.const import DOMAIN
+
+async def test_async_setup(hass):
+    """Test the component gets setup."""
+    assert await async_setup_component(hass, DOMAIN, {}) is True