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/editor/src/editor.rs

@@ -5613,6 +5613,7 @@ impl Editor {
                                 } else {
                                     Color::Default
                                 }),
+                                None,
                                 true,
                             ),
                         ))

crates/editor/src/element.rs

@@ -5784,6 +5784,7 @@ fn inline_completion_accept_indicator(
                 &accept_keystroke.modifiers,
                 PlatformStyle::platform(),
                 Some(Color::Default),
+                None,
                 false,
             ))
         })