chore(deps): 为mini-charts添加mini-testing-utils依赖

在mini-charts的package.json中添加@d8d/mini-testing-utils作为
devDependency，使用workspace:*协议引用本地包。

## 变更
- package.json: 添加 @d8d/mini-testing-utils workspace依赖
- pnpm-lock.yaml: 更新lock文件

## workspace链接
pnpm会自动将mini-testing-utils链接到mini-charts的node_modules中，
无需从npm registry下载。

🤖 Generated with [Claude Code](https://claude.com/claude-code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

mini-ui-packages/mini-charts/package.json

@@ -33,6 +33,7 @@
     "react-dom": "^18.0.0"
   },
   "devDependencies": {
+    "@d8d/mini-testing-utils": "workspace:*",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/react": "^16.3.0",
     "@types/jest": "^29.5.14",

pnpm-lock.yaml

@@ -1332,6 +1332,9 @@ importers:
         specifier: ^18.0.0
         version: 18.3.1(react@18.3.1)
     devDependencies:
+      '@d8d/mini-testing-utils':
+        specifier: workspace:*
+        version: link:../mini-testing-utils
       '@testing-library/jest-dom':
         specifier: ^6.8.0
         version: 6.9.1