Fix storybook (#3379)

This PR fixes storybook and gets it back into a compiling and running
state.

Release Notes:

- N/A

crates/ui2/src/components/stories.rs

@@ -6,3 +6,12 @@ mod icon;
 mod input;
 mod keybinding;
 mod label;
+
+pub use avatar::*;
+pub use button::*;
+pub use checkbox::*;
+pub use context_menu::*;
+pub use icon::*;
+pub use input::*;
+pub use keybinding::*;
+pub use label::*;