Use plotly to make sunburst vizualization of hierarchy

Description: We want to use plotly to visualize the results.json hierarchy.

Task:

[x] Crate a new parameter in the main.py (in the argument parser, should be something like -vs (i.e. vizualize sunburst --vizualizesunburst)
[x] Create a module that uses plotly
[x] Opens the results.json
[x] Goes through the hierarchy (files, classes, methods, statements and gets their scores, file scores should cumulated by their properties)
[x] Transfer this data to plotly's sunburst
[x] Dump a HTML file under the vizualizations folder (if doesn't exist, create one)
[ ] Use the already existing HTML opener in the Java part of CharmFL

Expected result: When I provide the file name in the parameter of -vs argument it creates a HTML file

SzatmariA / CharmFL-dev