Add TypeScript Refactoring Playbook foundation#62775

PaulyBearCoding wants to merge 1 commit intomicrosoft:mainmicrosoft/TypeScript:mainfrom

PaulyBearCoding:claude/finish-task-01Ju3D6BY9pBUsAMCrAxqncjPaulyBearCoding/TypeScript:claude/finish-task-01Ju3D6BY9pBUsAMCrAxqncjCopy head branch name to clipboard