usetrmnl.com for Plato suspend intermission screen

[ewired]

An API client for https://usetrmnl.com to have Plato show useful dashboards as the suspend screen. This code was written in my Remote Display fork but it's perfectly cherry pickable into upstream Plato. It's been working great for me so far while my main wi-fi network is available. Still needs better battery and signal reporting inspired by https://github.com/usetrmnl/trmnl-kobo