refactor: remove legacy playlist and file management code

src/Pages/AddOrEditPlaylist.vue

src/Pages/EmissionManager.vue

src/Pages/FileManager.vue

src/components/CalendarDayView.vue

src/components/filemanager/Files.vue

src/components/filemanager/ImportLog.vue

src/components/filemanager/Jumbotron.vue

src/components/filemanager/Playlists.vue

src/components/shows/FallbackSelector.vue

src/components/shows/MetaSimpleTypes.vue

src/components/shows/PlaylistSelector.vue

src/mixins/playlist.js

src/store/index.js

src/store/modules/files.js

src/store/modules/playlists.js

src/stores/shows.ts