Cave Light Source: Glowworm-Infested Blocks

Glowworms and Glowworm-infested blocks. Patches of Glowworm-infested blocks could generate inside large caves as a new Cave Light Source. Similar to silverfish, glowworms would "infest" stone blocks. When they do, the infested block would emit a light level of seven and change texture to show bright spots to signify that it is a glowworm infested block. When broken, glowworm-infested stone blocks would release one glowworm which would try to flee from the player and hide in other infestable blocks. The texture of Glowworms (the mob itself) when outside an infestable block would glow in a way similar to how glow squids, magma cube cores, vexes, and eyes of endermen, spiders, and drowned glow.