Ability to add other visualization plugins

[tfrancart]

Is your feature request related to a problem? Please describe.
I would like to customize how visualization results are displayed. Maybe I would like a vis.js timeline, maybe a leaflet map, maybe a graph that hides blank nodes, maybe a graph where the size/color of nodes depends on another column in the result set, etc...

Describe the solution you'd like
The ability to add other tabs to a query results visualization, by providing the corresponding code in e.g. a plugin folder.

Additional context
I am working with RDF and SPARQL, but the same should be possible with other query languages