App-author crate. One dependency for a window, widgets, and [Entity].
Layer crates (inset-widgets, inset-foundation, …) stay the source of
truth. This crate re-exports the types an application names. Hosts and
ports still depend on the layer crates directly.
use inset::{
App, Column, DefaultEmbedder, IntoWidget, Shell, StatelessWidget, Text, WidgetRef,
run_app,
};