Handle inline comments on .project/maintainers.yaml file

Allow maintainer-d to process `.project/maintainers.yaml` files that have inline or full line comments.

Issue encountered when adding Apicurio Registry project to maintainer-d.

https://github.com/Apicurio/.project/blob/main/maintainers.yaml

Looks like the inline comments broke ingestion of the maintainers. We never want to stand in the way of added documentation so we should handle this.

A first pass implementation will just ignore comments, a second pass implemetaion might ingest the comment if that proves useful.