Filewatcher and Reload

[KhanMechAI]

Hey team,

It would be super useful if there was some kind of file watcher or a reload method to reload a modified config at runtime.

I guess this would fall under enhancement or feature request.

[silvanmelchior]

Interesting idea! I don't have the time to do this now, but open for further discussions about how this should work (not very trivial with the singletons and multi-source setup) or a PR