Update Standard Logic App setup documentation

Refreshes SetupLogicApp-Standard-Agent.md with revised setup steps. Adds 6 new screenshots (image78-83.png) referenced by the updated doc. image1-71 and image72-77 remain unchanged in destination.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: hsainimsft