Start on ui root doc

Co-Authored-By: Marshall Bowers <1486634+maxdeviant@users.noreply.github.com>

crates/ui2/src/lib.rs

@@ -9,6 +9,37 @@
 //!
 //! Expect some inconsistencies from component to component as we work out the best way to build these components.
 //!
+//! ## Getting Started
+//!
+//! This is a quick primer to get you started using the UI components.
+//!
+//! You shouldn't need to construct an element from scratch very often. If you find
+//! yourself manually styling things like hover, text colors, etc, you should
+//! probably check that there isn't already a base component for whatever you are building.
+//!
+//! Here is an into to some of the most common elements:
+//!
+//! ### Text
+//!
+//! For generic UI text most frequently you will use a [`Label`] component.
+//!
+//! ```rust
+//! use ui2::prelude::*;
+//! use ui2::{Label, LabelColor};
+//!
+//! pub fn render_some_ui_text<V: 'static>() -> impl Component<V> {
+//!     div().p_2().child(
+//!         Label::new("Hello World")
+//!             .color(LabelColor::Muted)
+//!     )
+//! }
+//! ```
+//!
+//! ### Interactive Elements
+//!
+//! - Icon: To make an icon interactive, use [`IconButton`].
+//! - Button: To make a button interactive, use [`Button`].
+//!
 //! ## Design Philosophy
 //!
 //! Work in Progress!