Fix item damage component and event object schema (#316)

* Fix item damage component
* Remove duplicate event schema and unnecessary pattern match

source/behavior/items/format/components/damage.json

@@ -1,12 +1,25 @@
 {
   "$id": "blockception.minecraft.behavior.items.minecraft:damage",
-  "additionalProperties": false,
-  "type": "object",
   "title": "Damage",
   "description": "The damage component determines how much extra damage the item does on attack.",
-  "required": ["value"],
-  "properties": { "value": { "type": "number", "title": "Value", "description": "How much extra damage the item does, must be a positive number.", "minimum": 1 } },
-  "examples": [
-    { "value": 7 }
-  ]
+  "oneOf": [
+    {
+      "type": "number",
+      "minimum": 1
+    },
+    {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["value"],
+      "properties": {
+        "value": {
+          "type": "number",
+          "title": "Value",
+          "description": "How much extra damage the item does, must be a positive number.",
+          "minimum": 1
+        }
+      }
+    }
+  ],
+  "examples": [{ "value": 7 }]
 }