Add unitHint for color temperature channels

[andrewfg]

Refers to #17638 (comment)

• AVMFritz => done in this PR
• AmazonEcho => possible breaking change: consider to change channel type to system:color-temperature-abs
• Dali => uses system:color-temperature-abs
• Deconz => possible breaking change: consider to change channel type to system:color-temperature-abs (plus add a dynamic state provider)
• Dmx => nothing to change, the value is not directly a Kelvin or mirek value
• Epson projector => nothing to change, the value is not directly a Kelvin or mirek value
• Feican => nothing to change, the value is not directly a Kelvin or mirek value
• Govee => done in this PR
• Hue => uses system:color-temperature-abs with dynamic state provider
• LG TV serial => nothing to change, the value is not directly a Kelvin or mirek value
• Lifx => uses system:color-temperature-abs with dynamic state provider
• MiHome => possible breaking change: channel is of type 'Dimmer' with state unit in Kelvin ?? (this seems rather mixed up)
• MiLight => nothing to change, the value is not directly a Kelvin or mirek value
• MQTT:EspMiLightBulb => uses system:color-temperature-abs with dynamic state provider
• MQTT:HomeAssistant => TBD ??
• MQTT:Homie => TBD ??
• NanoLeaf => uses system:color-temperature-abs with dynamic state provider
• Samsung TV => nothing to change, the value is not directly a Kelvin or mirek value
• Smart things => possible breaking change: consider to change channel type to system:color-temperature-abs
• Sony projector => nothing to change, the color temperature is a list of discrete values
• Tapo => possible breaking change: consider to change channel type from 'Number' to 'Number:Temperature'
• TPLink => possible breaking change: consider to change channel type from 'Number' to 'Number:Temperature'
• Tradfri => uses system:color-temperature-abs
• Yeelight => nothing to change, the value is not directly a Kelvin or mirek value
• Zigbee => uses system:color-temperature-abs with dynamic state provider
• ZWave => nothing to change, the value is not directly a Kelvin or mirek value
• ZWay => nothing to change, the value is not directly a Kelvin or mirek value

Signed-off-by: AndrewFG [email protected]

[andrewfg]

@lolodomo can you please give me your thoughts about the above-mentioned bindings which are marked to consider a possible breaking change?