Add compiler compatibility test suite for anonymous records with MSBuild-generated build verification and comprehensive documentation#18913

T-Gro merged 32 commits into

maindotnet/fsharp:mainfrom

copilot/fix-7efdf64f-592c-4ce7-9871-9e7dadc5a81edotnet/fsharp:copilot/fix-7efdf64f-592c-4ce7-9871-9e7dadc5a81eCopy head branch name to clipboard