Add sensor-config commands [guidance needed)

[oscgonfer]

This is a pull request to add sensor configuration commands for the new sensors implemented in the Air Quality module and which available configs are in the admin.proto already: https://github.com/meshtastic/protobufs/blob/master/meshtastic/admin.proto#L644-L654

However, I have the feeling that I am doing something wrong while parsing the options, as I assume there must be some sort of better option than manually typing all of them... (see https://github.com/fablabbcn/meshtastic-python/blob/b54ac0e0f0aaee60c5a54069e47bbb6c7818447a/meshtastic/node.py#L980-L1021)

An example of what I am doing to test this is:

meshtastic --sensor-config scd4x_config.factory_reset true --host 192.168.1.136

Which successfully reaches the node and gets processed via admin command.