[Feature]: Piramid for fence post, slab with piramid on top, and slab with piramid on top for post.

[winsrp]

Describe the feature

So, I will just put a screenshot to better explain XD

the idea is to have a piramid that can have a fence on top, this will work great for flags on castles, also, it would be great to have a slab with a slab piramid on top, and a slab with piramid piramid that can have a post. ideally the slab with slab piramid can be painted half and half.

An easier implementation is to allow the slab piramid to be put on the upper half of a slab, and have the post variant!

thanks so much for this great mod! and if you end up making these variants could you please add them to 1.19.2 =D