Migrate Pre-existing Active Effects to new model.

[PrototypeESBU]

v4.0.0 introduces a new was of applying Active Effects bonuses and new validation rules for active effects. Migrations should be setup for all known pre-existing AEs to ensure a smooth transition to the new model. Some AE data migration have been added to Update_251001_1.mjs but more need to be identify, written in and tested.

Some exiting AEs may produce an error when loaded ERROR: Cannot Resolve AE