Feature: new body text style

## Summary
Body text font style and size have been updated.

## Objectives
- [ ] font-family is set correctly across the entire app
- [ ] font-size is set correctly
- [ ] font-weight is set correctly

## Mockups
- https://www.figma.com/file/SmslveGClPv8Rk5gTKsAOZ/Trash-Panda%2C-Lynn-B.-Kendra-M.?node-id=925%3A405
