feat(api): REST endpoints for blocks, block groups, items, preview + scheduling search pickers
Adds BlockController (block groups + blocks CRUD, items GET, full replace, non-persisting preview) mirroring ScheduleController, plus four scheduling search picker endpoints on SearchController (collections, television shows, television seasons, smart collections). Response DTOs in ErsatzTV.Core/Api/ Scheduling; request DTOs with ToCommand index auto-assignment. #144 S1 (#162) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in: