Add Icons with light/dark themes to Everything server primitives. #3131
Description
Is your feature request related to a problem? Please describe.
To fully support SEP-973, we need to demonstrate icons (with light/dark) themes in a reference server, and to test such functionality in the Inspector.
Describe the solution you'd like
The Everything server already has an icon and website url, so SEP-973 is already there. For full support, we need to add for icons (with light/dark) themes in the Everything server, everywhere that icons are supported.
Additional Context
When the support for SEP-973 was added to the Inspector, @jesselumarie kindly provided a test server to demonstrate. This may be useful as a reference when implementing in the Everything server.