refactor(engine): flatten

- add `just stats`
- add basic doctests

app/tek_struct.rs

@@ -5,7 +5,25 @@ use builder_pattern::Builder;
 /// Total state
 ///
 /// ```
+/// use tek::tek_device::TracksView;
 /// let app: tek::App = Default::default();
+/// let _ = app.scene_add(None, None)?;
+/// let _ = app.update_clock();
+/// app.project.editor = Some(Default::default());
+/// //let _: Vec<_> = app.project.inputs_with_sizes().collect();
+/// //let _: Vec<_> = app.project.outputs_with_sizes().collect();
+/// let _: Vec<_> = app.project.tracks_with_sizes().collect();
+/// //let _: Vec<_> = app.project.scenes_with_sizes(true, 10, 10).collect();
+/// //let _: Vec<_> = app.scenes_with_colors(true, 10).collect();
+/// //let _: Vec<_> = app.scenes_with_track_colors(true, 10, 10).collect();
+/// let _ = app.project.w();
+/// //let _ = app.project.w_sidebar();
+/// //let _ = app.project.w_tracks_area();
+/// let _ = app.project.h();
+/// //let _ = app.project.h_tracks_area();
+/// //let _ = app.project.h_inputs();
+/// //let _ = app.project.h_outputs();
+/// let _ = app.project.h_scenes();
 /// ```
 #[derive(Default, Debug)] pub struct App {
     /// Base color.
@@ -120,6 +138,9 @@ use builder_pattern::Builder;
 ///
 /// ```
 /// let cli: tek::Cli = Default::default();
+///
+/// use clap::CommandFactory;
+/// tek::Cli::command().debug_assert();
 /// ```
 #[derive(Debug, Parser, Default)]
 #[command(name = "tek", version, about = Some(HEADER), long_about = Some(HEADER))]