feat: 脚本操作支持节点快捷脚本. 语法与 Shadowrocket 脚本类似

```
$server.name = '前缀-' + $server.name
$server.ecn = true
$server['test-url'] = 'http://1.0.0.1/generate_204'
```

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.14.88",
+  "version": "2.14.89",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {