Add a page about pool status

[friedger]

It would be nice to show that the status of a pool linked from "Waiting on the pool"

The page could show

• time until start of the next cycle
• amount of locked STX for next cycle (partial stacked)
• amount of STX read to earn (total locked)
• number of pool members not yet locked
• estimated amount missing to get one more slot

[friedger]

The pool info would be a good place to link from

[friedger]

This also depends on what is available on stacking.club @aulneau