Add comprehensive summary section to QuickStart tutorial#1

wnsgml7838 wants to merge 1 commit intoteddynote-lab:mainteddynote-lab/langgraph-tutorial:mainfrom

wnsgml7838:claude/add-langgraph-tutorial-notes-011CUnFG7uPysbaBJ6HCj6pEwnsgml7838/langgraph-tutorial:claude/add-langgraph-tutorial-notes-011CUnFG7uPysbaBJ6HCj6pECopy head branch name to clipboard