refactor(list-item): improve layout system and remove implicit child composition

Refactor ListItem to improve Material Design 3 compliance, remove problematic children patterns, improve performance characteristics, and modernize the public API.

**Problems**

- Current API relies heavily on children composition in ways that are difficult to optimize
- Internal layout logic is tightly coupled to arbitrary child structures
- MD3 behaviors and visuals are not fully aligned with current Material guidelines
- Rendering performance can degrade in large lists or frequently updated screens
- Type safety and discoverability of the API can be improved
- The component has inconsistent behavior between platforms and edge cases

**Focus Areas**

- Replace arbitrary child composition with explicit slots
- Improve left/right accessory APIs
- Standardize spacing and density
- Improve multiline layout behavior
- Improve virtualization friendliness

**Proposed API Direction**

Instead of:

`

`

Prefer:

``

**Performance Opportunities**

- Improve rendering in FlatList usage
- Memoize accessories
- Reduce layout passes
- Avoid child traversal

该 issue 没有指定实现文件或测试；首先定位 TypeScript ListItem 组件并检查其当前用法，尤其是在 FlatList 中的用法。将针对 title、description、left 和 right 的显式 API 提案与现有的 children API 进行比较，然后在认为重构完成之前，确保覆盖间距、多行布局、平台行为和虚拟化。

由索引模型根据 Issue 内容生成。