break store into slices

[dpgraham4401]

This PR is a small PR that breaks our root store into slices to make possible expansion of the store easier and better debugging/development experience.

For future work related to only creating nodes/edges that we need to render, instead creating/editing all of them and rendering them as hidden. This wall allow us to take action when nodes/edges are create/deleted.

Description

Issue ticket number and link

Checklist

• I have added tests that prove my fix is effective or that my feature works
• 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