Feat: support arbitrary values when use plugin unocss

### Summary | 概述

_No response_

### Motivation | 背景

[Arbitrary values](https://tailwindcss.com/docs/adding-custom-styles#using-arbitrary-values) is not supported when using `@ice/plugin-unocss`.

### Usage example | 使用示例

_No response_

### Detailed design | 方案设计

Provider a preset or option to support arbitrary values.

### Additional context | 额外信息

_No response_

Start by examining the @ice/plugin-unocss package and how it currently configures UnoCSS presets or options. Define how arbitrary values should be enabled and verify that the documented Tailwind-style arbitrary values work when the plugin is used.

Written by the indexing model from the issue text.