fix: missing strike name and image

[lazybobcat]

I thought the strikes weren't working properly with PF2 hower it seems that the image and name are just not displayed when the action comes from a weapon item (which happen in the majority of cases).

I attempted to fix the code extracting the strike information so that:

• The image is taken from the action associated item (if any) if no image has been found on the action itself.
• The name of the action is taken from the action label attribute (since there is no name attribute) or from the item name if any and no label has been found on the action itself.

closes #3

Hope this helps :)

[lazybobcat]

Just in case it helps validates the PR, here is the JSON of the _token.actor.system.actions array output

actor-system-actions.json