some profunctor 4.4 and fusingLens/fusingTraversal docs
some profunctor 4.4 and fusingLens/fusingTraversal docs

cchalmers/lens,Gabriel439/lens,Fuuzetsu/lens,ddssff/lens,rpglover64/lens,danidiaz/lens,omefire/lens,cdepillabout/lens,Icelandjack/lens,timjb/lens