Info panel with embedded question/quiz

Some info panels will want to ask a simple question (i.e., multiple-choice). The "answer" could be a followup "page" of the info panel, so related to #31

Does codebase support this already? If not, figure it out! ;-)

Start by inspecting the existing info-panel implementation and the related work in issue #31. Determine whether embedded multiple-choice questions and follow-up pages are already supported; done requires a decided approach and a clearly defined implementation scope.

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