feat: Implemented launching and downloading of roms

This is just an initial implementation lots of kings to iron out

src/bun/utils.ts

@@ -16,4 +16,15 @@ export function checkRunning (pid: number)
     {
         return error.code === 'EPERM';
     }
+}
+
+export function getErrorMessage (error: unknown): string
+{
+    if (error instanceof Error) return error.message;
+    return String(error);
+}
+
+export function isSteamDeckGameMode ()
+{
+    return !!Bun.env.SteamDeck;
 }