Move to NextJS + other changes

src/types/DownloadProgress.ts

@@ -1,10 +0,0 @@
-import { LauncherVersion } from './LauncherVersion'
-
-export class DownloadProgress {
-  constructor (
-    public version: LauncherVersion,
-    public progress: number,
-    public failed: boolean,
-    public queued: boolean
-  ) {}
-}