Doku's RPG

Added:

• sulfur cube
• sulfur cube bucket
• sulfur cube spawn egg
• noxious gas particle
• sulfur blocks
• cinnabar blocks
• bed model

Edited:

• core shader entity.fsh
• beds

Other Changes and Notes:

• core shader entity.fsh updated to work with Vulkan, still works with OpenGL.
• mojang made a major change to beds, beds are no longer block entities, each of the 17 bed entity textures have been split into 7 block textures, there are 2 additional textures for the head and bottom of the bed that apply to all beds, in total there are now 114 bed texture files.
• changed the bed model so I could use the full bed texture I had from before the beds were a block entity.
• bed entity textures still included to maintain compatibility with 26.1