Feature: Assign repository collaborators based on regex

Would you consider adding support for assigning repository collaborators based on regex as well?

I can make a PR if you want!

Start by reviewing the TypeScript action and its existing collaborator-assignment behavior; the issue names no files, tests, or entry point. Clarify the regex syntax, matching scope, and expected collaborator-selection behavior with maintainers before implementation. Done means repository collaborators can be assigned according to the agreed regex behavior.

Written by the indexing model from the issue text.