chore: move default character package

resources/characters/.gitkeep

@@ -1 +0,0 @@
-

resources/characters/shiroko/README.md

@@ -0,0 +1,7 @@
+# 砂狼白子角色包 v2.1.0-stable
+
+按动画素材规范重新整理：所有帧均为 512x512 透明画布，未裁切角色本体；帧编号连续。
+
+帧数：idle 30，talk 20，think 30，sleep 30，drag 30，happy 20，error 20。
+
+说明：本版采用稳定坐标系与关键帧扩展方式生成，用于动画调试和桌宠加载器测试。

resources/characters/shiroko/character.json

@@ -0,0 +1,59 @@
+{
+  "schemaVersion": 1,
+  "id": "shiroko",
+  "displayName": "砂狼白子",
+  "author": "OpenAI",
+  "version": "2.1.0-stable",
+  "preview": "preview.png",
+  "defaultState": "idle",
+  "base": {
+    "width": 512,
+    "height": 512,
+    "scale": 1.0,
+    "anchorX": 0.5,
+    "anchorY": 1.0
+  },
+  "bubble": {
+    "offsetX": 0,
+    "offsetY": -475
+  },
+  "states": {
+    "idle": {
+      "path": "idle",
+      "fps": 9,
+      "loop": true
+    },
+    "talk": {
+      "path": "talk",
+      "fps": 8,
+      "loop": true
+    },
+    "think": {
+      "path": "think",
+      "fps": 8,
+      "loop": true
+    },
+    "sleep": {
+      "path": "sleep",
+      "fps": 4,
+      "loop": true
+    },
+    "drag": {
+      "path": "drag",
+      "fps": 12,
+      "loop": true
+    },
+    "happy": {
+      "path": "happy",
+      "fps": 8,
+      "loop": false,
+      "next": "idle"
+    },
+    "error": {
+      "path": "error",
+      "fps": 6,
+      "loop": false,
+      "next": "idle"
+    }
+  }
+}