Support for Plotly

[tuscland]

Plotly is a popular scientific charting library. It has a JSON schema similar to Vega in order to author and share charts. I suggest we support it. @MarieS-WiMLDS, WDYT?

See https://plotly.com/chart-studio-help/json-chart-schema/

[MarieS-WiMLDS]

100% agree, it's more and more used.

[sylvaincom]

Yes plotly is super powerful, I use it a lot (more than Altair) ; even people in academia use it

[thomass-dev]

@rouk1 how do you estimate the complexity of integrating a plotly-json in the frontend ?
In the backend, its simple as altair... i've drafted a PR.

[rouk1]

I suppose that if we store a json that match plotly's schema we will be ok on the frontend.

[thomass-dev]

I let you work directly on #381? Or you prefer to work on a separate PR?

[rouk1]

Let's do it in 1 PR : )