Phillips Hue Tap Dial Switch does not expose all attributes

I open the issue here because there is no missing attributes template in the zigbee2mqtt projekt.

The Philips 8719514440937/8719514440999 Hue Tap Dial Switch does not expose all attributes to homeassistant correctly.

Missing attributes are "brightness" and "action_step_size".

These attributes are very helpfull when building automations and allmost impossible to simulate.
I currently need to use NodeRed and sniff the MQTT traffic directly to take advantage of these attributes. Would be awesome if they could be exposed as entities to homeassistant too.

The section is here:

zigbee-herdsman-converters/src/devices/philips.ts

Line 2882 in ed7ed68

exposes: [e.battery(),

and the documentation here: https://github.com/Koenkk/zigbee2mqtt.io/blob/master/docs/devices/8719514440937_8719514440999.md

also the attribute "action_time" is labeled wrong:

zigbee-herdsman-converters/src/devices/philips.ts

Line 2893 in ed7ed68

e.numeric('action_time', ea.STATE)

Its the amount of time the action took and not the raw rotation value.