Checklist

• I added a descriptive title
• I searched open reports and couldn't find a duplicate

What happened?

We recently added the ability to expose new settings via the conda_settings plugin hook. We should add some user facing documentation talking about how to discover and set these settings.

Additional Context

See the work that was previous done on this here:

• Add better integration of settings plugin hook into conda config #13661
• Allow plugins to define arbitrary configuration parameters #13552