Implement URL parameter to specify remote input file

[lehkost]

First off, thanks for this great addition to the Gephi universe. We're using Gephi Lite it in teaching from day 1.

One feature request we would like to bring forward is to allow a GEXF/GraphML source file submitted through a URL parameter. Something like &input=https://dracor.org/api/v1/corpora/fre/plays/moliere-avare/networkdata/gexf.

I know, you can already "Open remote graph" from the Gephi Lite frontend, but using an URL parameter would allow us to link directly from our platform (e.g. https://dracor.org/id/fre000996#downloads) to Gephi Lite with the source file in question.