added a showversion button with popup to the interface

frontend/wailsjs/go/main/App.d.ts

@@ -42,6 +42,8 @@ export function MyAnimeListLogin():Promise<void>;
 
 export function MyAnimeListUpdate(arg1:main.MALAnime,arg2:main.MALUploadStatus):Promise<main.MalListStatus>;
 
+export function ShowVersion():Promise<void>;
+
 export function SimklGetUserWatchlist():Promise<main.SimklWatchListType>;
 
 export function SimklLogin():Promise<void>;