Make planks tool materials (#772)

* Make planks tool materials, update cobble palette

* Fix formatting

assets/cubyz/blocks/birch_planks.zig.zon

@@ -1,6 +1,18 @@
 .{
 	.class = .wood,
 	.hardness = 7,
+	.item = .{
+		.material = .{
+			.density = 0.6,
+			.resistance = 0.8,
+			.power = 0.2,
+			.roughness = 0.7,
+			.colors = .{
+				0xff9b7a5b, 0xffbf9872, 0xffdeb287, 0xfff2c89c, 0xffffdfb7,
+			},
+		},
+	},
+
 	.drops = .{
 		.auto,
 	},

assets/cubyz/blocks/cobblestone.zig.zon

@@ -8,10 +8,11 @@
 			.power = 0.4,
 			.roughness = 1.0,
 			.colors = .{
-				0xff222222, 0xff444444, 0xff666666, 0xff888888, 0xffaaaaaa,
+				0xff3d3d3d, 0xff535353, 0xff6b6b6b, 0xff81807e, 0xff9c9996,
 			},
 		},
 	},
+	
 	.drops = .{
 		.auto,
 	},

assets/cubyz/blocks/mahogany_planks.zig.zon

@@ -1,6 +1,18 @@
 .{
 	.class = .wood,
 	.hardness = 7,
+	.item = .{
+		.material = .{
+			.density = 1.0,
+			.resistance = 1.2,
+			.power = 0.3,
+			.roughness = 0.7,
+			.colors = .{
+				0xff734c2f, 0xff8e5d38, 0xffa26a3f, 0xffbd7e48, 0xffcf9459,
+			},
+		},
+	},
+	
 	.drops = .{
 		.auto,
 	},

assets/cubyz/blocks/oak_planks.zig.zon

@@ -1,6 +1,18 @@
 .{
 	.class = .wood,
 	.hardness = 7,
+	.item = .{
+		.material = .{
+			.density = 1.0,
+			.resistance = 1.0,
+			.power = 0.2,
+			.roughness = 0.7,
+			.colors = .{
+				0xff835e37, 0xffa37543, 0xffbd8a4f, 0xffd3a164, 0xffe5b570,
+			},
+		},
+	},
+
 	.drops = .{
 		.auto,
 	},

assets/cubyz/blocks/pine_planks.zig.zon

@@ -1,6 +1,18 @@
 .{
 	.class = .wood,
 	.hardness = 7,
+	.item = .{
+		.material = .{
+			.density = 1.5,
+			.resistance = 1.2,
+			.power = 0.2,
+			.roughness = 0.7,
+			.colors = .{
+				0xff533f27, 0xff664c2e, 0xff795a37, 0xff8c6b41, 0xffa37b46,
+			},
+		},
+	},
+	
 	.drops = .{
 		.auto,
 	},