Evaluate or replace formula data when applying effects or enchantments

[krbz999]

Proof-of-concept PR on how the system might use roll data from a caster on a target or other evaluated values.

Related issues: #3809, #4437, #4464, #4465

When granting an effect or enchantment via the effect trays,

• if ActiveEffect#flags.dnd5e.application.mode is "evaluate", then the effect will attempt to retrieve roll data from the origin and use a copy of the changes array where the values are fully evaluated (dice rolls performed if needed);
• if it's "replace", then roll data in the values are simply replaced with the caster's, allowing the target to make use of it.
• The "evaluateSelf" mode is identical to "evaluate" but uses the target's own roll data (more niche but still useful for stuff like an enchantment that uses roll data targeting a NumberField).

TODO:

• Add these options in the effect config.
• Consider whether the option should be in the data model instead; perhaps a data model for the base type, which the enchantment type could then extend.

Some notes:

While I did consider placing this in _preCreate, it isn't possible to determine if the creation of the effect was due to just wanting to copy from one item/actor to another during data entry or to grant the item/actor the effect.

[tposney]

Very nice - I can rip out most of the guts of dae if this goes in.