Add basic controls to HADiscovery

[saveriol]

Hello!
With this PR I added two basic controls to HADiscovery.py:

• PowerState: this is now a switch, to turn on and off the device.
• Program: these are now buttons, to start programs.

Of course this is an experiment but it should work.

P.s.: devices.json needs to be regenerated or manually edited to change:

 "539": {
                "name": "BSH.Common.Setting.PowerState",
        ...
                "discovery": {
                    "component_type": "binary_sensor",
                    "payload_values": {
                        "device_class": "power"
                    }
                }
            },

to

 "539": {
                "name": "BSH.Common.Setting.PowerState",
        ...
                "discovery": {
                    "component_type": "switch"
                }
            },

Sample image for clothes washer

[saveriol]

Marked as draft as I want to have a better look into availability for these new controls.

[JxxIT]

Great, thanks for this! I have a dishwasher that has a lot of entities, I'll look at my other entities later and maybe make a PR.

[Meatballs1]

See #103 PowerState should be an enum with On/Off/Standby