have js load plotly json directly

[vandenman]

Requires jasp-stats/jaspBase#208 and jasp-stats/jaspGraphs#154

As we discussed in the meeting, before in jaspPlot we still printed and saved all the plotly information in analyses.json in a jasp file. This could get quite big and was just duplicate because it's the exact same information as in the actual json files.

In a nutshell:

• removes loadPlotlyJsonInResults and everything around it.
• instead js loads the plotly json file directly.
• jaspBase: instead of ColumnEncoder::decodeJson(plotlyJson); in analysis.cpp, we now do this in R right before writing the json file using writeLines(.plotlyToJson(plotlyOrTryError), plotlyJsonFile). We don't expose decodeJson so this first decodes the R object and then make it into json.
• jaspGraphs: to properly decode the plotly object I needed to pass extra information to jaspBase that was originally only added when asked for the return value in json form. I could have avoided this PR, but then we would have done an additional json roundtrip.

Obviously made with 🤖 .