Package deprecated flag

[Southclaws]

When a package is no longer maintained, outdated and/or replaced by a new package, there should be a way to indicate this to dependent packages and users of those packages.

This can be done with a deprecated flag which can optionally include a pointer to a possible replacement package.

[BigETI]

Probably add a way to detect if a package has unresolved issues reported by the community, and the package has been abadoned and left without having the deprecated flag set.

[Y-Less]

Most things have issues.