Supermarket monitoring page should give you useful information

[tas50]

Is your feature request related to a problem? Please describe.
The current Supermarket monitoring page just tells you there's data, but nothing about what format it's in or what to do with it.

https://docs.chef.io/supermarket_monitor/

Describe the solution you'd like
At the very least it should mention what format the data is in and give examples. It could then tell you to use your monitoring tool to parse that data.