Closes #ISSUE
Adds handling for Enums with fields (i.e. not `enum Foo { Yes, No }`) in
Settings UI. Accomplished by creating default values for each element
with fields (in the derive macro), and rendering a toggle button group
with a button for each variant where switching the active variant sets
the value in the settings JSON to the default for the new active
variant.
Release Notes:
- N/A *or* Added/Fixed/Improved ...
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Co-authored-by: Conrad <conrad@zed.dev>
