gpui: Improve window.prompt to support ESC with non-English cancel text on macOS (#29538)

Release Notes:

- N/A

----

The before version GPUI used `Cancel` for cancel text, if we use
non-English text (e.g.: "取消" in Chinese), then the press `Esc` to cancel
will not work.

So this PR to change it by use `PromptButton` to instead the `&str`,
then we can use `PromptButton::cancel("取消")` for the `Cancel` button.

Run `cargo run -p gpui --example window` to test.

---

Platform Test:

- [x] macOS
- [x] Windows
- [x] Linux (x11 and Wayland)

---------

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

crates/ui_prompt/src/ui_prompt.rs

@@ -1,8 +1,8 @@
 use gpui::{
     App, AppContext as _, Context, Entity, EventEmitter, FocusHandle, Focusable, FontWeight,
-    InteractiveElement, IntoElement, ParentElement, PromptHandle, PromptLevel, PromptResponse,
-    Refineable, Render, RenderablePromptHandle, SharedString, Styled, TextStyleRefinement, Window,
-    div,
+    InteractiveElement, IntoElement, ParentElement, PromptButton, PromptHandle, PromptLevel,
+    PromptResponse, Refineable, Render, RenderablePromptHandle, SharedString, Styled,
+    TextStyleRefinement, Window, div,
 };
 use markdown::{Markdown, MarkdownElement, MarkdownStyle};
 use settings::{Settings, SettingsStore};
@@ -35,7 +35,7 @@ fn zed_prompt_renderer(
     level: PromptLevel,
     message: &str,
     detail: Option<&str>,
-    actions: &[&str],
+    actions: &[PromptButton],
     handle: PromptHandle,
     window: &mut Window,
     cx: &mut App,
@@ -44,7 +44,7 @@ fn zed_prompt_renderer(
         |cx| ZedPromptRenderer {
             _level: level,
             message: message.to_string(),
-            actions: actions.iter().map(ToString::to_string).collect(),
+            actions: actions.iter().map(|a| a.label().to_string()).collect(),
             focus: cx.focus_handle(),
             active_action_id: 0,
             detail: detail