"Chain Berry" 1up-training-like berry

[GreyMario]

Picking up this berry causes its noded objects (special "seed" type objects) to appear. Remaining on the ground for longer than the natural collection delay while carrying this berry and its seeds will cause the berry and seeds to vanish, returning to its home. Collection of the berry is done by collecting all of its seeds, at which point the berry will autocollect.

Requested by NeoKat#7298

Personal note: I've got a fair idea how this is going to work. I think I'll be folding it into Berry Helper in a while (read: when I get around to it), which I'll be able and willing to make available to the collab. I'm just writing this issue so it's on the to-do list so we don't lose it.

[GreyMario]

I believe there are some changes I'd like to make to Everest's Generic Strawberry Seed, which was added as a solution to implementing "arbitrary seeded berry". These changes would support low-hassle implementation of this objective.

I might look into this in a couple of days. I'll self-assign for now.

[GreyMario]

Looking into "just implement it for this" tomorrow. GenericStrawberrySeed refactor is on the low-priority backburner.

[GreyMario]

I have most of the code, but I've not had the time nor mindset to bang out a custom shortened cutscene for this...