Allow the use of matchers in Taggable.tagged_with()

[robinboening]

After the switch from ActsAsTaggableOn to Gutentag a new Taggable module was introduced. It overrides the tagged_with class method both libraries are offering. Both libraries allow to choose the tag matching mechanism when using this method. Currently, the module does not allow this at all but hard codes match: :all when delegating to the original method.

Describe the solution you'd like
I'd like to change the tagged_with interface, but keep it backwards compatible. The benefit is we can fully support the underlying interface gutentag has to offer.

The implementation looks like this

def tagged_with(names=[], **args)
  if names.is_a? String
    names = names.split(/,\s*/)
  end

  if names.any?
    args.merge!(names: names)
  end

  super(args)
end

still supporting the current way of using it, without any behaviour change.

Alchemy::Attachment.tagged_with("foo, bar")

but allowing us to take advantage of other matchers than just all.

Alchemy::Attachment.tagged_with(["foo", "bar"], match: :any)

But it also allows for more...

Alchemy::Attachment.tagged_with(:ids => [tag_id], match: :any)