Add limit to minimum window size (#13126)

Release Notes:

- Add a limit to the minimum window size on macOS.

Here's the minimum window before change:
<img width="121" alt="image"
src="https://github.com/zed-industries/zed/assets/38318044/9e907194-42e5-457e-91ea-96613426b479">

After change:
<img width="410" alt="image"
src="https://github.com/zed-industries/zed/assets/38318044/6e9c3057-9860-4f4b-9a73-c158ebac5ba9">

crates/zed/src/zed.rs

@@ -105,6 +105,10 @@ pub fn build_window_options(display_uuid: Option<Uuid>, cx: &mut AppContext) ->
         display_id: display.map(|display| display.id()),
         window_background: cx.theme().window_background_appearance(),
         app_id: Some(app_id.to_owned()),
+        window_min_size: gpui::Size {
+            width: px(360.0),
+            height: px(240.0),
+        },
     }
 }