trapping wither in bedrock

[tildejustin]

already allowed, in common use

[Isntmexion]

I think this can be generalised to:
D.1.1.az) Trapping mobs with blocks
Two examples can then be provided, one being the classic trapping wither in bedrock: https://www.youtube.com/watch?v=PCkzhtBl_xY&t=91s
And the other being an example of "trapping" the wither without bedrock/being in blocks, since this is already widely used for obsidian farming in all portals: https://youtu.be/O-QgTljCgZw?si=zDEHvqWRmfAI_kHq&t=153

[r0hkx]

since this just applies to the wither, im adding the following to the doc now

"D.1.1.bb) Trapping wither" with the two examples linked above