Make SEO fields extendable on a per-collection basis

[V1OL3TF0X]

Hi,
My use case is this - a page that features Albums and Songs for a specific band. I'd like to be able to append fields like og:music:duration to songs, og:music:musician to an album etc, and have them appear with other SEO fields. (aither in the tab or in the SEO group)

I was thinking about three solutions, relatively easy to implement (looking at the current SEO plugin implementation)

• check for a group named a specific way in the collection config (although it seems a bit hacky, but best way to tie it into the current system),
• add a special field in CollectionConfig named seo or smth like that (really like the DX here, but that would mess with the types, because I don't think there is a way to make it plugin dependant),
• add a extraFields dict in seoPlugin config, which would be Record<slug, Field[]> (I think worse DX since you've got two places controlling the specific collection config, but it would be the cleanest)

Would love to hear what you think about it