Plotter: enhance output options

Current state

In the constructor of the Plotter, the user can specify the output format ("image", "html", "plot" etc..) and optionally an output_path.

Plotter has various methods creating charts and diagrams (e.g. distrib_attributes) which return nothing and call a self._output() method at the end. They also define the plot's name (e.g. "performance_attributes_distribution1d") that is later used as the default filename. The plots/graphs are plotly.express figures.

self._output() calls different plotly methods to output to different formats, according to the Plotter's output argument.

What is needed:

• access to that default filename or a possibility to set it, e.g. as an optional argument in the Plotter's methods. I need to find this file i.a. to display it in Grasshopper.
• to export static images, possibility to optionally specify output width and height and/or scale
• (tentatively) add write to svg, pdf, jpeg formats https://plotly.com/python/static-image-export/
• or otherwise access to the original figure, e.g. return it, and output nothing in _output() when'output'=None