Enable pytest-asyncio tests in CI (#3)

* Set asyncio_mode="auto" in pytest.ini config

Xref https://pytest-asyncio.readthedocs.io/en/latest/reference/configuration.html#asyncio-mode

* Add test-python GitHub Actions CI workflow

* Add `--color=yes` flag to force GitHub Actions logs to have color

Xref https://github.com/pytest-dev/pytest/issues/7443

* Refactor contents of test_api.py slightly

Using some ruff rules

* Delete test_api.py

* Make test_get_place async

* Make get_place async, and call .ainvoke method on it

pyproject.toml

@@ -33,3 +33,7 @@ build-backend = "hatchling.build"
 
 [tool.hatch.build.targets.wheel]
 packages = ["src/geo_assistant"]
+
+[tool.pytest.ini_options]
+addopts = "--color=yes"
+asyncio_mode = "auto"