[FEATURE]: Add TypeScript definitions for custom bundles

[Lexachoc]

Since plotly.js v4 includes built-in TypeScript definitions, it would be great if custom bundles could also generate matching TypeScript definitions.

This would make custom bundles safer and easier to use in TypeScript projects.

In my case, I sometimes use a custom bundle to test newly developed features before they are released. However, the custom bundle does not include corresponding type definitions, so I have to rely on the types from the latest released version.

This can lead to missing or mismatched types, especially when the custom bundle includes new APIs or features that are not yet available in the released version.

[camdecoster]

Thanks for the idea! I can understand why this would be useful, but the solution would require the script having to handle any custom bundle. I imagine that this would take a lot of guardrails to get everything working correctly. We probably won't have time to work on this any time soon, but I'd be happy to talk through potential solutions if you want to look at it.

[seshan18]

I like to work on this issue

[camdecoster]

@seshan18 what's your plan for adding this feature?