ts: Rework Object Management

src/api/api_v1_types.ts

src/components/AnnouncementComponent.tsx

src/components/CourseListing.tsx

src/components/OMConfigComponent.tsx

src/components/OMTypeEditor.tsx

src/components/Player.tsx

src/misc/Util.tsx

src/pages/courses.tsx

src/pages/index.tsx

src/pages/internal/import.tsx