feat: add linux support with osu-winello

src/lib/global.ts

@@ -6,6 +6,8 @@ import type { Release } from './types';
 
 export const currentView = writable<Component>(Loading);
 
+export const platform = writable<string>("");
+
 export const launcherVersion = writable<string>('');
 export const newVersion = writable<Release | undefined>(undefined);
 

src/lib/osuUtil.ts

@@ -116,3 +116,7 @@ export const exit = async () => await invoke('exit');
 export const getPlatform = async () => await invoke<string>('get_platform');
 export const isOsuCorrupted = async (folder: string) =>
   await invoke<boolean>('check_for_corruption', { folder });
+export const hasWMCTRL = async () =>
+  await invoke<boolean>('has_wmctrl');
+export const hasOsuWinello = async () =>
+  await invoke<boolean>('has_osuwinello');