Amends to-do items with BenchmarkDotNet and adds purpose (#5955)
Amends to-do items with BenchmarkDotNet and adds purpose (#5955)

Adds the main purpose disclaimer as the first thing so it's clearer.
Also adds BenchmarkDotNet as a desirable item to the to-do list.
amccool/orleans,ReubenBond/orleans,hoopsomuah/orleans,yevhen/orleans,jason-bragg/orleans,amccool/orleans,veikkoeeva/orleans,dotnet/orleans,jthelin/orleans,waynemunro/orleans,benjaminpetit/orleans,galvesribeiro/orleans,waynemunro/orleans,dotnet/orleans,ElanHasson/orleans,amccool/orleans,ibondy/orleans,ibondy/orleans,yevhen/orleans,galvesribeiro/orleans,ElanHasson/orleans,hoopsomuah/orleans