feat: 补全 registering-services / using-services 缺失的图标 (#34)

为两个缺 market.icon 的技能补 24×24 线性 SVG（icon: >- 折叠标量，置于 category 前，对齐仓库约定）；version 1.0.0→1.0.1。其余无图标条目为 pointer entry.json，需先扩 entry schema，另行处理。

skills/using-services/SKILL.md

@@ -5,7 +5,7 @@ description: >-
   catalog. Use when the user asks the Agent to call an API, search for an
   existing service, or query a backend that was registered via the
   registering-services skill. 调用某个 API、查找已有服务、访问已注册的后端服务时使用。
-version: 1.0.0
+version: 1.0.1
 type: meta
 risk_level: low
 status: enabled
@@ -18,7 +18,7 @@ tags:
   - meta
 metadata:
   author: desirecore
-  updated_at: '2026-05-28'
+  updated_at: '2026-06-29'
   i18n:
     default_locale: en-US
     source_locale: zh-CN
@@ -40,6 +40,8 @@ metadata:
       body: ./SKILL.md
       translated_by: human
 market:
+  icon: >-
+    <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="#34C759" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="9" width="6" height="6" rx="1.5"/><rect x="15" y="3" width="6" height="6" rx="1.5"/><rect x="15" y="15" width="6" height="6" rx="1.5"/><path d="M9 11.5h3.5V6H15"/><path d="M9 12.5h3.5V18H15"/></svg>
   category: productivity
   maintainer:
     name: DesireCore Official