Merge Component and ComponentPreview trait (#28365)

- Merge `Component` and `ComponentPreview` trait
- Adds a number of component previews
- Removes a number of stories

Release Notes:

- N/A

crates/ui/src/ui.rs

@@ -7,6 +7,7 @@
 //! - [`ui_macros`] - proc_macros support for this crate
 //! - `ui_input` - the single line input component
 
+pub mod component_prelude;
 mod components;
 pub mod prelude;
 mod styles;