USWDS-Compile - Feature: Make it easier to find theme settings

[mejiaj]

Is your feature request related to a problem? Please describe.

As a user I'd like to be able to know which settings I have available to modify without going to the website.

Describe the solution you'd like

Comments with all possible settings.

@use "uswds-core" with (
-  $setting: value,
-  $setting: value,
+  $theme-show-notifications: false,
+ // …Theme settings OR a way to find them without going to website.
);

Describe alternatives you've considered

Pointing them towards settings files in packages directory.

Additional context

A new issue to list of packages would also be nice to have.

Code of Conduct

• I agree to follow this project's Code of Conduct.
• I checked the current issues for duplicate feature requests.