Should `Chart2Music` is bundled in plotly.js or loaded as a separate script?

[archmoj]

#6680 adds options to use Chart2Music for accessibility feature. What we should do in terms of loading the library? Should it be included in the plotly.js bundle similar to maplibre-gl? Or do we want to load it as a separate script similar to MathJax?

Also wondering if MathJax is loaded in app studio?

[gvwilson]

@marthacryan please factor this into your thinking, esp. w.r.t. App Studio.