[Feature]: Allow functions that set images to use assets directly from addons

[Pmofmalasia]

Describe the Problem

Various functions used to set images currently do not accept assets directly from addons using the lib://namespace/path format, giving the error Argument number 1 invalid argument type for function X.

Functions tested so far:

• createToken()
• copyToken()
• setTokenImage()
• setTokenPortrait()
• setTokenHandout()

The Solution you'd like

Allow these functions to use assets directly from addons.

Alternatives that you've considered.

Not doing this

Additional Context

I tested all of the functions I could think of that set images, but this appears to affect all functions of that type so if there are any I didn't think of they should be checked as well.