Provide definitions for SLO calculations

[ricegi]

We need to define what the SLO is based on specifically, a period of time, a total capacity or consumption of error budget.

[norbertsuski]

@ricegi @tangollama could you please provide more description/use case/UI concepts to this idea?

[ricegi]

@norbertsuski - This was mostly for documentation purposes - just providing some UI guidance of what is being calculated.

But I think this is actually better off just in the docs - maybe we can just close this one out?