Add support for loyalty point events

[Topener]

Twitch Loyalty system has events for redeption, probably this can be added?

[baldnate]

Channel point redemptions are handled through the Twitch PubSub API, which is distinct from the Twitch IRC system that most of Twitch chat is built on.

[Gataquadrada]

I managed to interact with the loyalty system by toggling the option "Ask for user input" on my rewards and then using the unique custom_reward_id every rewarded message has.

When you ask for user input, Twitch ships the custom_reward_id along with the mesage through the IRC channel. And twitch-bot parses that value without any further modification.