Add behavior for non-declared referenced tags

[flickyiyo]

While incorporating changes for --ignoreExternalFences noticed that previous version outputs this message when a tag is being referred but the program doesn't find it in the specified directories.

Good-fences warning: Tag 'hoisted-addins' is referred to but is not defined in any fence.
    Fence: C:\Users\Usuario\client-web\packages\addins\packages\addins\owa-addins-osfruntime\fence.json
Done in 2.96s. 

This message appeared after I added the hoisted-addins without creating a fence.json without that tag.

Does this implementation already has this behavior?

[Adjective-Object]

Probably not