Make dicts/lists visualizable and add JSON as viz type

[wjayesh]

Describe changes

I added

• JSON as a visualization type.
• JSONString as a special type to visualize JSON-able outputs.
• visualization for dicts/lists in Jupyter notebook.

Action Required

• I need to figure out what changes should happen in the front end to display JSON types in a beautiful way.
• Need to update docs.

Pre-requisites

Please ensure you have done the following:

• [ ] I have read the CONTRIBUTING.md document.
• [ ] If my change requires a change to docs, I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] I have based my new branch on develop and the open PR is targeting develop. If your branch wasn't based on develop read Contribution guide on rebasing branch to develop.
• [ ] If my changes require changes to the dashboard, these changes are communicated/requested.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Other (add details above)