feat: update to tauri beta, add permissions (#862)

Co-authored-by: Lucas Nogueira <lucas@tauri.app>
Co-authored-by: Lucas Nogueira <lucas@crabnebula.dev>

plugins/window-state/src/cmd.rs

@@ -24,8 +24,10 @@ pub async fn restore_state<R: Runtime>(
 ) -> std::result::Result<(), String> {
     let flags = StateFlags::from_bits(flags)
         .ok_or_else(|| format!("Invalid state flags bits: {}", flags))?;
-    app.get_window(&label)
+    app.get_webview_window(&label)
         .ok_or_else(|| format!("Couldn't find window with label: {}", label))?
+        .as_ref()
+        .window()
         .restore_state(flags)
         .map_err(|e| e.to_string())?;
     Ok(())