Improve Block Variant Consistency (Slabs, Stairs, Walls, Fences)

Minecraft has many blocks with variants such as slabs, stairs, walls, and fences, but many other blocks are missing these variants. This makes some block sets feel incomplete and creates inconsistencies when building. It would be great if Mojang could gradually add missing variants like slabs, stairs, walls, and fences to more existing blocks in future updates. This would greatly improve building possibilities and make block palettes feel more complete and consistent.