feat(item) 添加物品系统

data/items.json

@@ -0,0 +1,114 @@
+{
+  "items": [
+    {
+      "id": "water_bottle",
+      "name": "瓶装水",
+      "description": "一瓶干净的饮用水，可以解渴。",
+      "type": "food",
+      "weight": 1.0,
+      "volume": 1.0,
+      "value": 5,
+      "sprite": {
+        "width": 16,
+        "height": 16,
+        "color": 255
+      },
+      "properties": {
+        "drinkable": true,
+        "nutrition": 0,
+        "hydration": 50
+      }
+    },
+    {
+      "id": "canned_food",
+      "name": "罐头食品",
+      "description": "一罐保质期很长的食品，可以提供营养。",
+      "type": "food",
+      "weight": 1.5,
+      "volume": 1.0,
+      "value": 10,
+      "sprite": {
+        "width": 16,
+        "height": 16,
+        "color": 16711680
+      },
+      "properties": {
+        "edible": true,
+        "nutrition": 100,
+        "hydration": 20
+      }
+    },
+    {
+      "id": "crowbar",
+      "name": "撬棍",
+      "description": "多功能工具，可以撬开门锁或作为武器。",
+      "type": "tool",
+      "weight": 3.0,
+      "volume": 2.0,
+      "value": 20,
+      "sprite": {
+        "width": 16,
+        "height": 16,
+        "color": 8421504
+      },
+      "properties": {
+        "tool_quality": 2,
+        "weapon_damage": 15
+      }
+    },
+    {
+      "id": "first_aid_kit",
+      "name": "急救包",
+      "description": "包含基本医疗用品，可以治疗伤口。",
+      "type": "medical",
+      "weight": 1.0,
+      "volume": 1.5,
+      "value": 30,
+      "sprite": {
+        "width": 16,
+        "height": 16,
+        "color": 16777215
+      },
+      "properties": {
+        "heal_amount": 50,
+        "usable": true
+      }
+    },
+    {
+      "id": "flashlight",
+      "name": "手电筒",
+      "description": "可以在黑暗中提供照明。",
+      "type": "tool",
+      "weight": 0.5,
+      "volume": 0.5,
+      "value": 15,
+      "sprite": {
+        "width": 16,
+        "height": 16,
+        "color": 16776960
+      },
+      "properties": {
+        "light_range": 10,
+        "battery_life": 100
+      }
+    },
+    {
+      "id": "knife",
+      "name": "小刀",
+      "description": "一把锋利的小刀，可以用作工具或武器。",
+      "type": "weapon",
+      "weight": 0.8,
+      "volume": 1.0,
+      "value": 12,
+      "sprite": {
+        "width": 16,
+        "height": 16,
+        "color": 4194304
+      },
+      "properties": {
+        "weapon_damage": 10,
+        "tool_quality": 1
+      }
+    }
+  ]
+}