A new method to create gantt chart

[tylerlong]

From @pubmania:

Hi, with my extremely limited knowledge I did manage to create an html page where if I put CSV for data it will create Gantt chart using timeline module of vis js. I used papaparse js to parse CSV and create json dataset. Code is here and demo is here.

I am hoping someone knowledgeable can now help integrate it with mermaid or atleast give me some pointers on how to go about doing it.

Quoted from #510

[stale]

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