Deep Underground (Mining Dimension)

Removed red onyx

Cerulium now has a more cerulean-colored look

Viridium tool textures now have a properly green outline (rather than blue-green)

Depthbound scrap texture lightened a bit

Portal is now transparent and properly animated

Portal ambient and break sounds updated

Added the missing Depthbound Steel tools (axe, hoe, pickaxe, shovel)

Portal can now only be lit in the Overworld and Deep Underground