Forge Attention Couple to imply Regional Prompter

BUR #490 is pending approval.

create implication forge_attention_couple -> regional_prompter

As far as I'm concerned, they're similar enough in functionality that I believe these two should be tied together. FAC is pretty much just regional prompting for A1111 Forge.

They differ not only in technical approach but also capability. Regional prompter is capable of separating regions in the latents, which is important because it allows you to different apply different loras to different spaces. Forge attention couple is attention only, as the name would imply.

Voting against for technical reasons. The basis is Forge Attention Couple is a completely different codebase than Regional Prompter. I think meta tags for extensions or code used to generate images should be implicated only if they are forks/derivatives of each other.