docs(skills): the end state after create-objectstack installs @objectstack/skills — one pinned --copy spelling, one next.0 exception, and the 17.x to 18 skills step (#23275)

docs(skills): the end state after create-objectstack installs @objectstack/skills — one pinned --copy spelling, one next.0 exception, and the 17.x to 18 skills step (#23275) #20408