Dynamic Asset File Path

[schwartzmj]

I'm looking to save certain uploaded files into a dynamic path, probably WordPress style e.g. /{currentYear}/{currentMonth}/filename.pdf or even /{taxonomy-slug}/filename.pdf.

I've tested listening for various Entry and Asset events, but I'm not finding a way to do it this way.

I propose allowing us to use Antlers to set a dynamic filepath for an Asset field, similar to how Titles and Routes work when setting up a collection.

[jasonvarga]

Duplicate of #725