Explore updates to our fluid type calculations for simplicity and accessibility

## Overview

We last refactored our fluid type calculations in 2021 (#1560), but since then there's been more research and development on the topic.

Our current calculations seem to be working well, but [there may be an accessibility issue with the negative number in the calculations](https://front-end.social/@aardrian@toot.cafe/109824015693243455).

Some more recent calculators do not seem to rely on negative calculations:

- [Utopia: Fluid type scale calculator](https://utopia.fyi/type/calculator/)
- [Min-Max Value Interpolation](https://min-max-calculator.9elements.com/)

We may want to test our fluid type more thoroughly, and possibly revisit our mixin to see if we can generate something even nicer.

首先检查当前的 fluid type 计算和 mixin，然后将它们的行为与 issue 中链接的 Utopia 和 Min-Max Value Interpolation 参考资料进行比较。测试现有计算是否存在与负值相关的无障碍问题，并记录是否有必要采用更简单的计算或更新 mixin。

由索引模型根据 Issue 内容生成。