Add error handling

[uhooi]

Warnings

Log

.../UhooiPicBook/Sources/AppModule/UIParts/Activity/ActivityRouter.swift:17:23: Todo Violation: TODOs should be resolved (エラーハンドリング). (todo)
.../UhooiPicBook/Sources/AppModule/Modules/MonsterList/Presenters/MonsterListPresenter.swift:65:16: Todo Violation: TODOs should be resolved (エラーハンドリング). (todo)
.../UhooiPicBook/Sources/AppModule/Modules/MonsterDetail/Views/MonsterDetailViewController.swift:103:20: Todo Violation: TODOs should be resolved (エラーハンドリング). (todo)
.../UhooiPicBook/Sources/AppModule/Modules/MonsterList/Views/MonsterListViewController.swift:127:20: Todo Violation: TODOs should be resolved (エラーハンドリング). (todo)

Screenshot

Warnings