Add config flow to Rainforest EAGLE-200 (#54846)

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

script/scaffold/templates/config_flow/tests/test_config_flow.py

@@ -15,7 +15,7 @@ async def test_form(hass: HomeAssistant) -> None:
         DOMAIN, context={"source": config_entries.SOURCE_USER}
     )
     assert result["type"] == RESULT_TYPE_FORM
-    assert result["errors"] == {}
+    assert result["errors"] is None
 
     with patch(
         "homeassistant.components.NEW_DOMAIN.config_flow.PlaceholderHub.authenticate",