Changes

[x] use framer for entrance and exit animations
[x] navigate to /workouts on successful submission
[x] change behavior of collapsing exercise rows
[x] implement tests for NewWorkout view
[x] refine newWorkout validation (see comment in #4)
- NOTE: completely empty exercise rows are not in newWorkout.exercises yet, so the form will pass validation with empty exercise rows.
[x] display summary of exercise in collapsed NewExercise view
[x] allow deletion of invididual exercise rows

Miscallaneous:

[x] add .editorconfig
[x] tweak jest config, settings (add userEvents, set up mock server)
[x] add RecoilRoot to custom test render
[x] update transparent values to rgba(0,0,0,0) for animation purposes
[x] enable workouts query only if currentUser exists
[x] implement a shared Tooltip component
[x] implement a useClickOutside hook -- currently only used to detect clicks outside Tooltips