Dynamic Panel - Support the accordion view for panels

[JaneSjs]

T25589 - Accordion Panels
https://surveyjs.answerdesk.io/internal/ticket/details/T25589

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In the meantime, it's possible to expand multiple panels: View Demo.
Consider introducing an API/option to enable the accordion mode where any previously open panel automatically collapses when a user expands a panel.

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I suggest using the following code:

survey.onElementContentVisibilityChanged.add((sender, options) => {
    const el = options.element;
    const parentQ = el.parentQuestion;
    if (el.isPanel && !!parentQ && parentQ.getType() === "paneldynamic") {
        if (el.isExpanded) {
            parentQ.visiblePanels.forEach(p => {
                if (p !== el) {
                    p.collapse();
                }
            })
        }
    }
});

Here is the example