👑 [需求] SchemaForm group 不支持 className

### 🔩 所属模块或组件
ProForm
SchemaForm

### 🥰 需求描述

group 不支持 className 或者自定义 render

### ⛰ 功能需求适用场景

group 增加 className 和 自定义 render参数

### 🧐 解决方案

### 🚑 其他信息

Start by locating the ProForm and SchemaForm group rendering entry points mentioned in the issue, then inspect how group options are currently defined. Confirm the expected API for className and custom rendering with existing component patterns; done means both options work for SchemaForm groups and are covered by appropriate tests.

Written by the indexing model from the issue text.