Add the ability to deprecate an artifact and indicate it's replaced by another

[gsmet]

For example, the org.hibernate:hibernate artifact is deprecated. But as it's the first one returned by the Maven Central Search engine, it's too highlighted for its own good.

Perhaps, we should also have a table with the artifact already followed which match the search above the table with the Maven Central Search results.

It might be a good idea to display the number of followers too (using the Spring cache feature for it might be a good idea).