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/gpui/src/platform/mac/window.rs

@@ -505,6 +505,7 @@ impl MacWindow {
             focus,
             show,
             display_id,
+            window_min_size,
         }: WindowParams,
         executor: ForegroundExecutor,
         renderer_context: renderer::Context,
@@ -646,6 +647,11 @@ impl MacWindow {
 
             native_window.setMovable_(is_movable as BOOL);
 
+            native_window.setContentMinSize_(NSSize {
+                width: window_min_size.width.to_f64(),
+                height: window_min_size.height.to_f64(),
+            });
+
             if titlebar.map_or(true, |titlebar| titlebar.appears_transparent) {
                 native_window.setTitlebarAppearsTransparent_(YES);
                 native_window.setTitleVisibility_(NSWindowTitleVisibility::NSWindowTitleHidden);