Making rendering of plots faster

[ngupta23]

Related Issuse or bug

#2149

Describe the changes you've made

• scatter changed to scattergl for faster rendering
• Used fig.batch_update() to update figure in one shot
• Switched from interactive renderer to static render above a certain number of data points but provided an option to users to specify renderer so they can still use interactive renderer if they wish.
• Added example notebooks for exogenous variables and how to model with them (initial attempt)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Plotting unit tests ran locally and passed.

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.

[Yard1]

Looks awesome!