added current level startup to ikea lights

[dannyneup]

I've added the current level startup to the Ikea lights LED2005R5/LED2106R3 as requested in zigbee2mqtt#22786

It might be worth considering including the attribute in the ikeaLight class, as the poweronbehavior is also set there by default and requires the current level startup or on level anyways. I therefore see no reason to make this attribute directly available to users.
However, I have refrained from doing this for the time being, as I only have this one device type to test and, to be honest, I am not deep enough in the code to be able to make a qualified judgment.
I tested with this external converter. Works without any problems.

const { light } = require('zigbee-herdsman-converters/lib/modernExtend');

const definition = {
    zigbeeModel: ['TRADFRI bulb GU10 WS 345lm'],
    model: 'TRADFRI bulb GU10 WS 345lm',
    vendor: 'IKEA of Sweden',
    description: 'Automatically generated definition',
    extend: [
        light(
            { 
                colorTemp: { "range": [250, 454] }, 
                levelConfig: { 
                    disabledFeatures: [
                        "on_off_transition_time",
                        "on_transition_time", 
                        "off_transition_time",
                        "on_level"
                    ]
                }
            } 
        ) 
    ], 
    meta: {}
};

module.exports = definition;

[Koenkk]

I think it makes sense to add this to all IKEA bulbs

[dannyneup]

I think it makes sense to add this to all IKEA bulbs

Done :)

[marazmarci]

I think it makes sense to add this to all IKEA bulbs

Done :)

@dannyneup, thanks! Could you please also update the PR's title? It would be a bit misleading in the git history if it were merged with this commit message 🙂

[Koenkk]

Thanks!