[Feature] More Block Predicates implementation

[zndrmn]

The author of More Block Predicates has given permission to use their project (yippie!)

Having something like this up-to-date would be absolutely amazing for resource pack creators

omoflop/MoreBlockPredicates#24

[Motschen]

I'm currently working on it, though it's harder to port than I expected, due to recent changes in 1.21.5, as well as the need for cross-loader support.
I'll figure it out eventually :)

[frugbug]

Hi just wondering if this is still planned? This is really good functionality that I miss from the old MBP mod... i'd be thrilled to see it arrive in here!!

[Motschen]

I'm currently working on it in a separate branch, but will release a version for testing soon :)