Support to get everything from repo

[mosabua]

It would be nice to get whatever is there in the remote repo for a specific GAV .. e.g. all the classifier based additional artifacts like -test, -test-source, -jar-with-dependencies and so on.

This might be hard or impossible to implement properly. It would probably require some sort of protocol to the remote server to see whats available. E.g. it could be a HTML directory listing that is scraped or a proper API. And would be different for different source repositories... so lots of work potentially. Not sure if this is needed at this stage.

[cstamas]

It could be done in case of Central using SMO Search https://github.com/apache/maven-indexer/tree/master/search-backend-smo