feat: Expose action parameters: group, level, rate, step size and transition time

[andrei-lazarov]

See each commit for easier review

This pull request exposes the following entities for remotes that use standard functions m.commandsCluster():

• action_group
• action_level
• action_rate
• action_step_size
• action_transition_time

I covered only OnOff and LevelControl clusters.
More should be aded in the future, for ColorControl, Scenes, WindowCovering: action_hue, action_direction, action_saturation, action_color etc.

These parameters were already published to MQTT, just not exposed.
Should be no functionality changes, just easier use. It makes them show up in WF, HA and docs.

I triggered a docgen to check the results: andrei-lazarov/zigbee2mqtt.io@6daf67e

And of course I tested locally

[andrei-lazarov]

Also I don't like how they are separate entities. Maybe we can rework in Z2M 3.0.0?

"voltage": 2500,
"action": "off",
"action_group": 21658     

"voltage": 2500,
"action": {
    "command": "off",
    "group": 21658
}