refactor: Let serde serialize Add Series and Add Movie enums instead of calling to_string up front

src/cli/sonarr/add_command_handler.rs

@@ -137,12 +137,12 @@ impl<'a, 'b> CliCommandHandler<'a, 'b, SonarrAddCommand> for SonarrAddCommandHan
           root_folder_path,
           quality_profile_id,
           language_profile_id,
-          series_type: series_type.to_string(),
+          series_type,
           season_folder: !disable_season_folders,
           tags,
           tag_input_string: None,
           add_options: AddSeriesOptions {
-            monitor: monitor.to_string(),
+            monitor,
             search_for_cutoff_unmet_episodes: !no_search_for_series,
             search_for_missing_episodes: !no_search_for_series,
           },