Toggle & Switch (#21979)

![CleanShot 2024-12-13 at 11 27
39@2x](https://github.com/user-attachments/assets/7c7828c0-c5c7-4dc6-931e-722366d4f15a)

- Adds the Switch component
- Updates `Selected`, `Selectable` -> `ToggleState`, `Toggleable`
- Adds `checkbox` and `switch` functions to align better with other
elements in our layout system.

We decided not to merge Switch and Checkbox. However, in a followup I'll
introduce a Toggle or AnyToggle enum so we can update
`CheckboxWithLabel` -> `ToggleWithLabel` as this component will work
exactly the same with either a Checkbox or a Switch.

Release Notes:

- N/A

crates/ui/src/prelude.rs

@@ -12,8 +12,8 @@ pub use crate::traits::clickable::*;
 pub use crate::traits::component_preview::*;
 pub use crate::traits::disableable::*;
 pub use crate::traits::fixed::*;
-pub use crate::traits::selectable::*;
 pub use crate::traits::styled_ext::*;
+pub use crate::traits::toggleable::*;
 pub use crate::traits::visible_on_hover::*;
 pub use crate::DynamicSpacing;
 pub use crate::{h_flex, h_group, v_flex, v_group};