adds dRNG section in dashboard

packages/binary/drng/events.go

plugins/spa/drng_livefeed.go

plugins/spa/frontend/package-lock.json

plugins/spa/frontend/src/app/components/Drng.tsx

plugins/spa/frontend/src/app/components/DrngLiveFeed.tsx

plugins/spa/frontend/src/app/components/Root.tsx

plugins/spa/frontend/src/app/stores/DrngStore.tsx

plugins/spa/packrd/packed-packr.go

plugins/spa/plugin.go