[FC-0099] docs: add ADR proposing architecture for authz framework#57

mariajgrimaldi wants to merge 2 commits intomainopenedx/openedx-authz:mainfrom

MJG/authz-architecture-and-data-modelingopenedx/openedx-authz:MJG/authz-architecture-and-data-modelingCopy head branch name to clipboard