add api documentation for /consensus/block
add api documentation for /consensus/block

mnsl/Sia,mtlynch/Sia,rivine/rivine,MrStrong/Sia,NebulousLabs/Sia,Mingling94/Sia,ericflo/Sia,rivine/rivine,johnathanhowell/Sia,MrStrong/Sia,ChrisSchinnerl/Sia,mharkus/Sia,NebulousLabs/Sia,mharkus/Sia,mnsl/Sia,ChrisSchinnerl/Sia,ericflo/Sia,mtlynch/Sia