cmd: Unwrap adapter modules to get underlying modules

[WeidiDeng]

Fix 5621.

In addition, this also fixed several add(remove)-package related commands as they can't be used to add or remove adapter related modules.

Before,

After,

[WeidiDeng]

You mean adapters are not part of modules, and will not show as so. However, they will show in the new list-plugin command?

They are of course affected by add / remove package commands.

[WeidiDeng]

What should be the definition of a plugin? Maybe just config-adapters are more expressive?

[mholt]

Well, I'm not sure if a new list-plugins command is the right answer -- maybe it is. I need to think about it more, or maybe have a discussion about other good solutions.