[Enhancement] repository diagnostics

[MattG57]

How can we improve?

We need to enhance this diagnostics logic to also check the number of repositories that each org has applied the GitHub App to.
the file that needs to be modified is:

https://github.com/austenstone/github-value/blob/main/frontend/src/app/main/diagnostics/main-diagnostics.component.ts

[MattG57]

Let's reopen this PR since it now has a custom instruction for Copilot