Set appid/wmclass for zed window (#10909)

fixes https://github.com/zed-industries/zed/issues/9132

By setting the app id, window managers like `sway` can apply custom
configuration like `for_window [app_id="zed"] floating enable`.
Tested using `wlprop`/`hyprctl activewindow` for wayland, `xprop` for
x11.


Release Notes:

- Zed now sets the window app id / class, which can be used e.g. in
window managers like `sway`/`i3` to define custom rules

crates/gpui/src/platform/linux/wayland/window.rs

@@ -609,6 +609,10 @@ impl PlatformWindow for WaylandWindow {
         self.borrow_mut().toplevel.set_title(title.to_string());
     }
 
+    fn set_app_id(&mut self, app_id: &str) {
+        self.borrow_mut().toplevel.set_app_id(app_id.to_owned());
+    }
+
     fn set_background_appearance(&mut self, _background_appearance: WindowBackgroundAppearance) {
         // todo(linux)
     }