Feature/luumr light bulb

[jannik-rahm]

Added proper support for this light bulb. The old generic/white label implementation lead to strange behavior (in HA at least). Also to subsequent logs piling up:

2026-02-24 11:49:36.240 WARNING (MainThread) [homeassistant.components.mqtt.light.schema_json] Invalid color mode 'hs' received for entity

2026-02-24 11:49:44.785 ERROR (MainThread) [homeassistant.helpers.template] Template variable error: 'value_json' is undefined when rendering '{% if value_json.do_not_disturb %}true{% else %}false{% endif %}'

2026-02-24 11:51:18.486 WARNING (MainThread) [homeassistant.helpers.template] Template variable warning: 'dict object' has no attribute 'power_on_behavior' when rendering '{{ value_json.power_on_behavior }}'

Link to picture pull request: Koenkk/zigbee2mqtt.io#4860