Add Alpine.morphBetween()

[calebporzio]

No description provided.

[ekwoka]

The naming for this is really awkward, since normally "between" like this indicates a start and end for the transition.

For your use case, could you not use a Range to handle the issue of needing a root node? Just make a range that encloses the start and end markers you have and pass that in as the from in the normal Morph.