text: Title: [FEATURE] Consolidate toml and tomli across preswald
  Body: **Is your feature request related to a problem? Please describe.**
  We are using both toml and tomli. Why use both when tomli is known to be faster, and more modern.
  
  **Describe the solution you'd like**
  Let's consolidate everywhere to just using tomli everywhere. Replace toml with tomli in usage, and then remove toml from setup.py