Feature request: expose plotting stats API for Chia Dashboard

[VerstandInvictus]

For those of us using https://dashboard.chia.foxypool.io/ it would be great for plotng-managed plots to be visible in the dashboard, especially if we're running multiple machines.

As per https://github.com/felixbrucker/chia-dashboard-satellite/issues/11 on the dashboard dev's repo, plot managers could expose a similar plotting API to the main Chia GUI to allow his software to pick up on it.