Add UI setting components (#13550)

Adds some of the UI components to allow us to visually render settings.

These are UI only and are not functional yet (@maxdeviant will be
working on these when he is back.)

You can see some examples by running `script/storybook setting`.

![CleanShot 2024-06-26 at 12 38
37@2x](https://github.com/zed-industries/zed/assets/1714999/b5e6434d-3bc5-4fcd-9c0a-d280950cbef2)

Release Notes:

- N/A

crates/ui/src/components.rs

@@ -4,6 +4,7 @@ mod checkbox;
 mod context_menu;
 mod disclosure;
 mod divider;
+mod dropdown_menu;
 mod icon;
 mod indicator;
 mod keybinding;
@@ -14,6 +15,7 @@ mod popover;
 mod popover_menu;
 mod radio;
 mod right_click_menu;
+mod setting;
 mod stack;
 mod tab;
 mod tab_bar;
@@ -30,6 +32,7 @@ pub use checkbox::*;
 pub use context_menu::*;
 pub use disclosure::*;
 pub use divider::*;
+use dropdown_menu::*;
 pub use icon::*;
 pub use indicator::*;
 pub use keybinding::*;
@@ -40,6 +43,7 @@ pub use popover::*;
 pub use popover_menu::*;
 pub use radio::*;
 pub use right_click_menu::*;
+pub use setting::*;
 pub use stack::*;
 pub use tab::*;
 pub use tab_bar::*;