Not officially (i.e. out-of-the-box) I'm afraid, but it can be added through some scripting to link the two together. @ezsilman actually posted such a script to the AC wiki here, but it may be out of date.
That's not really a question specific to AC, and it's generally down to what best suits your art style. Unity, and AC by extension, also allows for multiple resolution options to be shown - so you're not limited to just one.
Comments
Not officially (i.e. out-of-the-box) I'm afraid, but it can be added through some scripting to link the two together. @ezsilman actually posted such a script to the AC wiki here, but it may be out of date.
Other discussions regarding Spine can be found here:
https://www.adventurecreator.org/forum/discussion/2336/best-implementation-of-spine-spriter-export
https://www.adventurecreator.org/forum/discussion/4332/spine-integration
https://www.adventurecreator.org/forum/discussion/4305/spine-integration