add graves datapack from vanillatweaks

src/graves/pack.mcmeta

@@ -0,0 +1,49 @@
+{
+	"pack": {
+		"pack_format": 88,
+		"supported_formats": {"min_inclusive": 88, "max_inclusive": 88},
+		"min_format": 88,
+		"max_format": 88,
+		"description": [{"text":"Graves","color":"gold"}, {"text": "\nvanillatweaks.net", "color": "yellow"}]	
+	},
+	"overlays": {
+		"entries": [
+			{
+				"formats": {
+					"min_inclusive": 57,
+					"max_inclusive": 2147483647
+				},
+				"directory": "overlay_57",
+				"min_format": 57,
+				"max_format": 2147483647
+			},
+			{
+				"formats": {
+					"min_inclusive": 61,
+					"max_inclusive": 2147483647
+				},
+				"directory": "overlay_61",
+				"min_format": 61,
+				"max_format": 2147483647
+			},
+			{
+				"formats": {
+					"min_inclusive": 71,
+					"max_inclusive": 2147483647
+				},
+				"directory": "overlay_71",
+				"min_format": 71,
+				"max_format": 2147483647
+			},
+			{
+				"formats": {
+					"min_inclusive": 88,
+					"max_inclusive": 2147483647
+				},
+				"directory": "overlay_88_0",
+				"min_format": 88,
+				"max_format": 2147483647
+			}
+		]
+	}
+}