Introduce KeybindingHint (#24397)

- Implements scaling for `ui::Keybinding` and it's component parts
- Adds the `ui::KeybindingHint` component for creating keybinding hints
easily:

![CleanShot 2025-02-04 at 16 59
38@2x](https://github.com/user-attachments/assets/d781e401-8875-4edc-a4b0-5f8750777d86)

Release Notes:

- N/A

crates/ui/src/components.rs

@@ -11,6 +11,7 @@ mod image;
 mod indent_guides;
 mod indicator;
 mod keybinding;
+mod keybinding_hint;
 mod label;
 mod list;
 mod modal;
@@ -47,6 +48,7 @@ pub use image::*;
 pub use indent_guides::*;
 pub use indicator::*;
 pub use keybinding::*;
+pub use keybinding_hint::*;
 pub use label::*;
 pub use list::*;
 pub use modal::*;