Glimmergills and Glimmergill caves (#1174)

* Add glimmergills and glimmergill caves

* Lower glimmergill cave height

* Formatting

assets/cubyz/biomes/cave/glimmergill.zig.zon

@@ -0,0 +1,51 @@
+.{
+	.isCave = true,
+	.maxHeight = -200,
+	.minHeight = -48250,
+	.chance = 0.05,
+	.fogDensity = 2,
+
+	.music = "cubyz:heart-of-the-beast",
+
+	.structures = .{
+		.{
+			.id = "cubyz:ground_patch",
+			.block = "cubyz:clay",
+			.chance = 0.08,
+			.width = 5,
+			.variation = 5,
+			.depth = 3,
+			.smoothness = 0.3,
+		},
+		.{
+			.id = "cubyz:stalagmite",
+			.block = "cubyz:stone",
+			.chance = 0.048,
+			.size = 3,
+			.size_variation = 6,
+		},
+		.{
+			.id = "cubyz:boulder",
+			.chance = 0.016,
+			.block = "cubyz:cobblestone",
+			.size = 4,
+			.size_variance = 3,
+		},
+		.{
+			.id = "cubyz:boulder",
+			.chance = 0.016,
+			.block = "cubyz:stone",
+			.size = 4,
+			.size_variance = 4,
+		},
+		.{
+			.id = "cubyz:flower_patch",
+			.block = "cubyz:glimmergill",
+			.chance = 0.35,
+			.width = 8,
+			.variation = 4,
+			.density = 0.06,
+			.priority = 0.1,
+		},
+	},
+}

assets/cubyz/blocks/glimmergill.zig.zon

@@ -0,0 +1,24 @@
+.{
+	.tags = .{.wood},
+	.blockHealth = 0.2,
+	.drops = .{
+		.{.items = .{.auto}},
+	},
+	.solid = false,
+	.viewThrough = true,
+	.absorbedLight = 0x010101,
+	.emittedLight = 0x392862,
+	.collide= false,
+	.rotation = .torch,
+	.model = .{
+		.base = "cubyz:glimmergill/floor",
+		.side = "cubyz:glimmergill/shelf",
+	},
+	.texture = "cubyz:glimmergill_side",
+	.texture_top = "cubyz:glimmergill_top",
+	.texture_bottom = "cubyz:glimmergill_bottom",
+	.item = .{
+		.texture = "glimmergill.png",
+	},
+	.lodReplacement = "cubyz:air",
+}

assets/cubyz/models/glimmergill/floor.obj

@@ -0,0 +1,78 @@
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+v 0.25 0.25 0.25
+v 0.25 0.75 0.25
+v 0.75 0.75 0.25
+v 0.75 0.25 0.25
+vt 0 0.25
+vt 0 0.125
+vt 0.125 0.125
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+vn 0 0 1
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+f 10/33/9 15/34/9 14/35/9 11/36/9
+f 12/37/10 13/38/10 16/39/10 9/40/10

assets/cubyz/models/glimmergill/shelf.obj

@@ -0,0 +1,78 @@
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+v 0.2500000000000001 0.375 0.4375
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