Fixing up bp items

Author: DaanV2

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

@@ -9,14 +9,18 @@
     },
     {
       "type": "object",
-      "additionalProperties": true,
+      "additionalProperties": false,
       "required": ["textures"],
       "properties": {
         "textures": {
           "title": "Textures",
           "description": "Contains key-value pairs of textures used by the item",
           "type": "object",
-          "additionalProperties": true,
+          "additionalProperties": {
+            "type": "string",
+            "title": "Texture",
+            "description": "The key from the resource_pack/textures/item_texture.json `texture_data` object associated with the texture file Example: blaze_powder."
+          },
           "required": ["default"],
           "properties": {
             "default": {

test/files/correct/data_bp/items/test2.item.json

@@ -10,7 +10,7 @@
     "components": {
       "minecraft:can_destroy_in_creative": { "value": false },
       "minecraft:max_stack_size": { "value": 64 },
-      "minecraft:icon": { "value": "stick" },
+      "minecraft:icon": { "textures": { "default": "stick" } },
       "minecraft:glint": { "value": true },
       "minecraft:damage": { "value": 2 },
       "minecraft:stacked_by_data": { "value": true },