Async downloader, better Proton support (#183)

* feat: async downloader + other fixes

* feat: windows command parsing + use library path for install path

* feat: better proton support

* feat: style fixes and store button now uses in-app

* feat: emulator rename + umu emulator fix

* feat: bring process creation inline with docs

* fix: clippy

desktop/src-tauri/client/src/app_state.rs

@@ -2,9 +2,17 @@ use serde::Serialize;
 
 use crate::{app_status::AppStatus, user::User};
 
+#[derive(Clone, Serialize)]
+pub enum UmuState {
+    NotNeeded,
+    NotInstalled,
+    Installed,
+}
+
 #[derive(Clone, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct AppState {
     pub status: AppStatus,
-    pub user: Option<User>
-}
+    pub user: Option<User>,
+    pub umu_state: UmuState,
+}