Document usage of matplotlib, plotly, supported versions of plots in DeepForge

[umesh-timalsina]

This is the active list of Matplotlib figure types supported in deepforge any other plot type from matplotlib will not be drawn for an execution.

To use matplotlib currently for plots, it has to be less than version 3.3.0( 3.2.2 is default).

The following gist consists of examples of operations in deepforge and images of plots created.deepforge

IsSupported	MatplotlibType	Issue/PR
☑️	Line	#1308 / #1329
☑️	Image	#1218 / #1373
☑️	Scatter	#1394 / #1546
☑️	Histogram	#1745 / #1747
☑️	BarChart	#1745 / #1747
❎	PieChart	#1745 / #1747

[brollb]

Closing this since all the listed types are now supported and the documentation is up to date.

[umesh-timalsina]

If we want to keep it in a more easily discoverable location, we can simply add it to the docs (maybe here: https://deepforge.readthedocs.io/en/latest/reference/operation_feedback.html).