feat: Obtain list of repositories automatically

[oSumAtrIX]

Feature description

Right now, an environment variable configures it, but it can instead fetch public repos automatically. However, naming them still would be manual. A variable can also configure exclusion.

Motivation

Avoids keeping the variable up to date with new repositories

Acknowledgements

• I have checked all open and closed feature requests and this is not a duplicate
• I have chosen an appropriate title.
• All requested information has been provided properly.