Add Caps Lock support (#30470)

Closes #21700

Release Notes:

- Added caps lock support and show a warning if the user is entering an
SSH password with Caps Lock enabled

---------

Co-authored-by: Mikayla Maki <mikayla@zed.dev>
Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Co-authored-by: 张小白 <364772080@qq.com>

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

@@ -21,11 +21,6 @@ use wayland_protocols::xdg::shell::client::xdg_surface;
 use wayland_protocols::xdg::shell::client::xdg_toplevel::{self};
 use wayland_protocols_plasma::blur::client::org_kde_kwin_blur;
 
-use crate::platform::{
-    PlatformAtlas, PlatformInputHandler, PlatformWindow,
-    blade::{BladeContext, BladeRenderer, BladeSurfaceConfig},
-    linux::wayland::{display::WaylandDisplay, serial::SerialKind},
-};
 use crate::scene::Scene;
 use crate::{
     AnyWindowHandle, Bounds, Decorations, Globals, GpuSpecs, Modifiers, Output, Pixels,
@@ -34,6 +29,14 @@ use crate::{
     WindowBackgroundAppearance, WindowBounds, WindowControlArea, WindowControls, WindowDecorations,
     WindowParams, px, size,
 };
+use crate::{
+    Capslock,
+    platform::{
+        PlatformAtlas, PlatformInputHandler, PlatformWindow,
+        blade::{BladeContext, BladeRenderer, BladeSurfaceConfig},
+        linux::wayland::{display::WaylandDisplay, serial::SerialKind},
+    },
+};
 
 #[derive(Default)]
 pub(crate) struct Callbacks {
@@ -861,6 +864,10 @@ impl PlatformWindow for WaylandWindow {
         self.borrow().client.get_client().borrow().modifiers
     }
 
+    fn capslock(&self) -> Capslock {
+        self.borrow().client.get_client().borrow().capslock
+    }
+
     fn set_input_handler(&mut self, input_handler: PlatformInputHandler) {
         self.borrow_mut().input_handler = Some(input_handler);
     }