This PR separates out the associated constant `KEY` from the `Settings`
trait into a new trait `SettingsKey`. This allows for the key trait to
be derived using attributes to specify the path so that the new
`SettingsUi` derive macro can use the same attributes to determine top
level settings paths thereby removing the need to duplicate the path in
both `Settings::KEY` and `#[settings_ui(path = "...")]`
Co-authored-by: Ben Kunkle <ben@zed.dev>
Release Notes:
- N/A
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Co-authored-by: Ben Kunkle <ben@zed.dev>
5f03202b5c