* Fix ZWave RGBW lights not producing color without explicit white_value (#13930)
* simplify conditional in previous commit (#13930)
* ZwaveColorLight - only zero _white if white_value not specified in call (#13930)
* Accept and report both xy and RGB color for lights
* Fix demo light supported_features
* Add new XY color util functions
* Always make color changes available as xy and RGB
* Always expose color as RGB and XY
* Consolidate color supported_features
* Test fixes
* Additional test fix
* Use hue/sat as the hass core color interface
* Tests updates
* Assume MQTT RGB devices need full RGB brightness
* Convert new platforms
* More migration
* Use float for HS API
* Fix backwards conversion for KNX lights
* Adjust limitless min saturation for new scale
