Tons of cleanup alongside a lot of new functionality. BotVac now provides an overall vacuum state as a single state, and can emit events to subscribers every time the state changes, as well as any lifespan or battery changes.
The BotVac can also now be created in a `monitor` mode, meaning the BotVac object will handle fetching initial state, refetching state after the BotVac goes offline then online, and regularly checking in on component lifespans.
All statuses are also now normalized so that the BotVac's reported statuses always match the names defined by the sucks library.
Greg Laabs
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