Remove chakra UI, we are not including anything that depends on react.  Import the d3 extensions that would be useful for this project.

Chakra UI imports have been removed from `src/main.jsx` as we are no longer including anything that depends on React. Additionally, D3 extension scripts for `d3-scale` and `d3-hierarchy` have been added to `src/index.html` to assist with the treemap project.