Add README for GraphQL
Add README for GraphQL

clsOrg/platform-samples,github/platform-samples,github/platform-samples,clsOrg/platform-samples,clsOrg/platform-samples,github/platform-samples,github/platform-samples,github/platform-samples,clsOrg/platform-samples,github/platform-samples,clsOrg/platform-samples,github/platform-samples,clsOrg/platform-samples,github/platform-samples