Added foliage and grass appearance components (#333)

source/resource/biomes/format/components/foliage_appearance.json

@@ -0,0 +1,46 @@
+{
+  "$id": "blockception.minecraft.resource.biomes.minecraft.foliage_appearance",
+  "title": "Foliage Appearance",
+  "description": "Set the foliage color or color map used during rendering. Biomes without this component will have default foliage appearance.",
+  "type": "object",
+  "required": ["color"],
+  "additionalProperties": false,
+  "properties": {
+    "color": {
+      "title": "Color",
+      "description": "RGB color of foliage, or a Foliage Color Map object.",
+      "default": { "color_map": "foliage" },
+      "examples": ["#FFFFFF", [255, 255, 255]],
+      "oneOf": [
+        {
+          "type": "string",
+          "format": "color-hex"
+        },
+        {
+          "type": "array",
+          "minItems": 3,
+          "maxItems": 3,
+          "additionalItems": false,
+          "items": {
+            "type": "integer",
+            "minimum": 0,
+            "maximum": 255
+          }
+        },
+        {
+          "type": "object",
+          "required": ["color_map"],
+          "additionalProperties": false,
+          "properties": {
+            "color_map": {
+              "title": "Color Map",
+              "description": "Color map from textures/colormap to determine color of foliage.",
+              "enum": ["birch", "evergreen", "foliage", "mangrove_swamp_foliage", "swamp_foliage"],
+              "default": "foliage"
+            }
+          }
+        }
+      ]
+    }
+  }
+}