Add support for dynamic content in homepage query examples

Created by: novoselrok

Fixes #40013 (closed)

This uses the compute API to gather the necessary data. The results are cached for 24 hours in temporary settings.

Screenshots

Long query example:

Test plan

• Go to the home page
• You should see dynamic content in place of the repo, file, and author filters

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.