Allows desktop apps to open mailto links (#4282)

* Allows desktop apps to open mailto links

* Drop webbrowser, use `open` only

* switch to that_detached

* use workspace `open`

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

packages/cli/src/build/request.rs

@@ -4148,7 +4148,7 @@ r#" <script>
                     .trim()
                     .into();
                 let path_to_sim = path_to_xcode.join("Applications").join("Simulator.app");
-                open::that(path_to_sim)?;
+                open::that_detached(path_to_sim)?;
             }
 
             Platform::Android => {