feat(weather): add openweather api

tests/test_openweather_api.py

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+import datetime
+
+import pytest
+
+from gallery.painting.openweather.api import OpenWeatherApi
+from gallery.painting.openweather.mock import OPENWEATHER_MOCK_DATA
+from gallery.painting.openweather.openweather import Forecast
+
+
+@pytest.fixture(name="openweather_api", scope="module")
+def openweather_api_fixture() -> OpenWeatherApi:
+    async def _get_location_forecast(location_id: str) -> Forecast:
+        return Forecast(**OPENWEATHER_MOCK_DATA.get_json("forecast"))
+
+    api = OpenWeatherApi()
+    api._get_location_forecast = _get_location_forecast
+    return api
+
+
+async def test_day(openweather_api: OpenWeatherApi):
+    result = await openweather_api.get_day("orel-4432", datetime.date(2024, 8, 23))
+    assert len(result.values) == 8
+
+
+async def test_days(openweather_api: OpenWeatherApi):
+    result = await openweather_api.get_days("orel-4432", 10)
+    assert len(result.values) == 6