(Unofficial) Forgotten Adventures Building Assets

Two of the windows, `Metal Double Window` and `Wood Double Window,` are now available as Portal assets. This allows them to be configured as to not block light. They are still available as objects as to keep this pack backwards compatible.

A new preview graphic was created as to better represent the contents of the pack.

All items are now sorted alphabetically in their tag. No assets have been added, modified, or removed in this update.