Add support for managing dehumidifier via LAN

[flyboy013]

It would be nice to be able to manage the dehumidifier directly instead of via the cloud. The device has port 6444 open and this can used to control the device. There is a Home Assistant integration for Midea air conditioner units that has this local management support. It is at https://github.com/mac-zhou/midea-ac-py

Since I don't have a Midea AC I am not familiar with the quality of the other integration, but perhaps the two integrations can be merged to provide support for both types of systems.

[35gh]

The integration mentioned above uses the msmart library which can detect my dehumidifier in my LAN:

pip3 install msmart
midea-discover

INFO:msmart.cli:msmart version: 0.1.35 Currently only supports ac devices.
INFO:msmart.cli:Sending Device Scan Broadcast...
INFO:msmart.lan:Got TCP key for 192.168.1.1:12947 -> 192.168.1.244:6444 retries: 0 time: 0.48 xxxxxxx INFO:msmart.cli:*** Found a device: {'type': 'a1', 'support': False, 'version': 3, 'ip': '192.168.1.100', 'id': iiiiiiiiiiiiii, 'port': 6444, 'token': 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx', 'key': 'yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy', 'ssid': 'net_a1_F58D'}'

This library currently supports only AC but I guess it should not be too difficult to adapt it for dehumidifiers.
It would definitely be a nicer integration than relying on the NetHome cloud.