Add a setting to show time to first window draw and frames per second in status bar (#16422)

I want to showcase Zed's performance via videos, and this seemed like a
good way to demonstrate it.


https://github.com/user-attachments/assets/f4a5fabc-efe7-4b48-9ba5-719882fdc856

Release Notes:

- On macOS, you can now set assign `performance.show_in_status_bar:
true` in your settings to show the time to the first window draw on
startup and then current FPS of the containing window's renderer.

---------

Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
Co-authored-by: Kirill Bulatov <kirill@zed.dev>
Co-authored-by: David Soria Parra <167242713+dsp-ant@users.noreply.github.com>
Co-authored-by: Danny Hua <danny.hua@hey.com>

crates/gpui/src/platform/linux/x11/window.rs

@@ -1,5 +1,3 @@
-use anyhow::Context;
-
 use crate::{
     platform::blade::{BladeRenderer, BladeSurfaceConfig},
     px, size, AnyWindowHandle, Bounds, Decorations, DevicePixels, ForegroundExecutor, GPUSpecs,
@@ -9,7 +7,9 @@ use crate::{
     X11ClientStatePtr,
 };
 
+use anyhow::Context;
 use blade_graphics as gpu;
+use futures::channel::oneshot;
 use raw_window_handle as rwh;
 use util::{maybe, ResultExt};
 use x11rb::{
@@ -1210,9 +1210,10 @@ impl PlatformWindow for X11Window {
         self.0.callbacks.borrow_mut().appearance_changed = Some(callback);
     }
 
-    fn draw(&self, scene: &Scene) {
+    // TODO: on_complete not yet supported for X11 windows
+    fn draw(&self, scene: &Scene, on_complete: Option<oneshot::Sender<()>>) {
         let mut inner = self.0.state.borrow_mut();
-        inner.renderer.draw(scene);
+        inner.renderer.draw(scene, on_complete);
     }
 
     fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas> {
@@ -1398,4 +1399,8 @@ impl PlatformWindow for X11Window {
     fn gpu_specs(&self) -> Option<GPUSpecs> {
         self.0.state.borrow().renderer.gpu_specs().into()
     }
+
+    fn fps(&self) -> Option<f32> {
+        None
+    }
 }