Support the umd output of @ice/runtime

### Summary | 概述

_No response_

### Motivation | 背景

Use @ice/runtime as an umd module.

### Usage example | 使用示例

_No response_

### Detailed design | 方案设计

Build a umd output when publish @ice/runtime.

### Additional context | 额外信息

_No response_

Start by locating the @ice/runtime package and its publishing and build configuration. Compare the outputs it currently produces with the requested UMD artifact, then check how published packages are verified. Done means @ice/runtime builds and publishes a usable UMD output.

Written by the indexing model from the issue text.