feat: skills delete — 交互式删除用户 Skill

新增 ias skills delete:
  扫描 skills/ 目录，列出所有用户 Skill
  MultiSelect TUI 选择要删除的 Skill
  确认后 remove_dir_all 物理删除

skills/amap-lbs-skill/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "amap-webservice",
+  "version": "1.0.0",
+  "description": "高德Web服务API向开发者提供HTTP接口，开发者可通过这些接口使用各类型的地理数据服务，返回结果支持JSON和XML格式。",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [
+    "amap",
+    "webservice",
+    "poi",
+    "geocoding"
+  ],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "axios": "^1.13.6"
+  }
+}