[Upstream] Move search out of cmd?

[Itxaka]

While implementing the search in hypper we foudn out that most of the code is under cmd for some reason.

As part of the implementation, the relevant code was moved out into a pkg/search as it makes sense to have it there, plus helm does not guarantee that code under cmd will stay, while they will respect the API in pkg.

Maybe we should test the waters upstream to make the change there instead so its more maintainable? Check why the code is in there in the first place?