Feat: Extension of Download Features, Batch Select, Error/Retry (#38)

src/types/api.ts

@@ -1,6 +1,7 @@
 export interface DownloadQueueItem {
   progress: number;
   state: "QUEUED" | "DOWNLOADING" | "FINISHED" | "ERROR";
+  tries: number;
   chapter: {
     id: number;
     name: string;
@@ -17,4 +18,4 @@ export interface DownloadStatus {
 
 export interface Connection<T> {
   nodes: T[];
-}
+}