Block traits (#227)

* - Spawn category

* - Block traits

source/behavior/blocks/format/minecraft.block.json

@@ -43,6 +43,16 @@
         "minecraft:queued_ticking": { "$ref": "./triggers/queued_ticking.json" },
         "minecraft:random_ticking": { "$ref": "./triggers/random_ticking.json" }
       }
+    },
+    "traits_ref": {
+      "type": "object",
+      "title": "Trait",
+      "description": "A shortcut for creators to use Vanilla block states without needing to define and manage a series of events or triggers on custom blocks",
+      "additionalProperties": false,
+      "properties": {
+        "minecraft:placement_position": { "$ref": "./traits/placement_position.json" },
+        "minecraft:placement_direction": { "$ref": "./traits/placement_direction.json" }
+      }
     }
   },
   "properties": {
@@ -238,6 +248,11 @@
               { "type": "object" }
             ]
           }
+        },
+        "traits": {
+          "type": "object",
+          "title": "Trait",
+          "$ref": "#/definitions/traits_ref"
         }
       }
     },