- Refactored actor-sheet.js to move most of its logic into a separate
helper.js module as static methods on a new SimpleHelper class. This
doesn't add anything functional at the moment, but it's in
preparation of re-using the same code for the item-sheet.js file.
- This commit adds a proof-of-concept for retrieving actor template
types. These are actors using the `worldbuilding.isTemplate` flag set
to true. If there are multiple actors with that flag set to true,
clicking the create actor button will pull up a prompt to choose from
one of those types, which will then create an actor by duplicating
the template actor's data. The flag will be unset on the new actor.
