linux: Respect window_min_size property (#15314)

https://github.com/zed-industries/zed/pull/13126 added the
`window_min_size` property for window creation, but it was only
implemented for macOS. This PR implements the property on Linux as well.

Release Notes:

- N/A

crates/gpui/src/platform.rs

@@ -706,7 +706,6 @@ pub(crate) struct WindowParams {
 
     pub display_id: Option<DisplayId>,
 
-    #[cfg_attr(target_os = "linux", allow(dead_code))]
     pub window_min_size: Option<Size<Pixels>>,
 }
 

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

@@ -264,7 +264,10 @@ impl WaylandWindow {
             .wm_base
             .get_xdg_surface(&surface, &globals.qh, surface.id());
         let toplevel = xdg_surface.get_toplevel(&globals.qh, surface.id());
-        toplevel.set_min_size(50, 50);
+
+        if let Some(size) = params.window_min_size {
+            toplevel.set_min_size(size.width.0 as i32, size.height.0 as i32);
+        }
 
         if let Some(fractional_scale_manager) = globals.fractional_scale_manager.as_ref() {
             fractional_scale_manager.get_fractional_scale(&surface, &globals.qh, surface.id());

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

@@ -14,6 +14,7 @@ use raw_window_handle as rwh;
 use util::{maybe, ResultExt};
 use x11rb::{
     connection::Connection,
+    properties::WmSizeHints,
     protocol::{
         sync,
         xinput::{self, ConnectionExt as _},
@@ -371,6 +372,14 @@ impl X11WindowState {
                     visual.depth, x_window, visual_set.root, bounds.origin.x.0 + 2, bounds.origin.y.0, bounds.size.width.0, bounds.size.height.0)
             })?;
 
+        if let Some(size) = params.window_min_size {
+            let mut size_hints = WmSizeHints::new();
+            size_hints.min_size = Some((size.width.0 as i32, size.height.0 as i32));
+            size_hints
+                .set_normal_hints(xcb_connection, x_window)
+                .unwrap();
+        }
+
         let reply = xcb_connection
             .get_geometry(x_window)
             .unwrap()