feat(compiler): add extends base type clause for unions - #11771

feat(compiler): add extends base type clause for unions#11771

Timothee Guerin (timotheeguerin) merged 8 commits into

microsoft:mainmicrosoft/typespec:mainfrom

JoshLove-msft:josh/union-extendsJoshLove-msft/typespec:josh/union-extendsCopy head branch name to clipboard