Split the default tours into multiple plugins

[jtpio]

Is your feature request related to a problem? Please describe.

This was originally discussed in jupyterlite/jupyterlite#287 (comment).

Where RetroLab doesn't handle the default welcome tour, but the notebook tour works out of the box.

Describe the solution you'd like

Maybe this logic could be split so the tours are added in separate plugins?

jupyterlab-tour/src/defaults.tsx

Lines 487 to 495 in bc979d7

	export function addTours(
	manager: ITourManager,
	app: JupyterFrontEnd,
	nbTracker?: INotebookTracker
	): void {
	const { commands, shell } = app;
	addWelcomeTour(manager, commands);
	addNotebookTour(manager, commands, shell as ILabShell, nbTracker);
	}

Or switch to using the settings-based way for defining tours for the defaults as well?

Describe alternatives you've considered

The plugin adding defaults could be disabled, and tours recreated manually.

Additional context

• Python package version: 3.1.2

• Extension version: 3.1.2

• Operating System and its version: Ubuntu 20.04

[fcollonval]

Those tours are more complicated as they interact with the UI. They cannot move to the settings.

I am not sure splitting them in multiple plugins is a good path as (I hope) the number of default tours will increase.

What about having a setting that select which default tours will be activated?