feat: Output images in grouped checklists

[ianjon3s]

What does this PR do?

• Updates expandable checklists to output images
• Also adds image output to "exclusive" option

Testing:
https://5941.planx.pizza/a-new-team/checklists/preview

[github-actions]

Pizza

Deployed 573fc14 to https://5941.planx.pizza.

Useful links:

• Editor
• Storybook
• Hasura
• API
• ShareDB
• LocalPlanning.services

[DafyddLlyr]

This does work as expected, but is a little bit of an anti-pattern I think. We're prop-drilling hasImages into multiple components when we could reach for getLayout() as we always have the associated option or groupedOptions. There's a potential here for bugs as we have two (possibly diverging) sources of truth - how should a component render where hasImages={true} but there are no img properties, or vice-versa?

Our current layouts consist of -

planx-new/apps/editor.planx.uk/src/@planx/components/shared/BaseChecklist/model.ts

Lines 26 to 30 in 893bdf6

	export enum ChecklistLayout {
	Basic,
	Grouped,
	Images,
	}

This PR would mean that this list is no longer a discrete description of the possible layouts - we can have grouped layouts with and without images.

I'd recommend taking a look at a solution which introduces a new layout, and updates the logic of getLayout() to reflect this.