Talk to the bot in order to CRUD sensors

[alenia]

This should also ideally change the channel topic

Comands:

• monitor [SensorName] AQI 40-50 "OK I'll let you know if the [SensorName] AQI drops below 40 or above 50"
• add sensor NAME ID (defaults to purpleair)
• remove sensor NAME
• reload re-initializes all sensors from the JSON

Eventually have conversations like:

• add sensor "By ID or by zip code?" ID "What is the sensor ID?" 12345 "What do you want to call the sensor?" name "Alright we're now set up in this channel to read from sensor 12345" (changes channel topic)