feat(swipe): add RTL mode

[ys152452]

新增了swipe在direction属性为rtl时的布局和交互
更好的支持阿拉伯语、波斯语等RTL语言场景

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 11 lines in your changes missing coverage. Please review.

Project coverage is 93.67%. Comparing base (1f24cbc) to head (7bd4dfd).

Files with missing lines	Patch %	Lines
packages/vant/src/swipe/Swipe.tsx	65.51%	8 Missing and 2 partials ⚠️
packages/vant/src/utils/dom.ts	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13123      +/-   ##
==========================================
- Coverage   93.81%   93.67%   -0.14%     
==========================================
  Files         257      257              
  Lines        6999     7018      +19     
  Branches     1730     1742      +12     
==========================================
+ Hits         6566     6574       +8     
- Misses        377      386       +9     
- Partials       56       58       +2     

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[chenjiahan]

这个 PR 看起来会极大地影响 Swipe 组件的性能，因为涉及到大量的 isRtl() 调用，里面需要调用 getComputedStyle，会产生性能开销。

社区里 Swipe 组件一般都是怎么适配 RTL 的呢？感觉需要先做下调研

[ys152452]

这个 PR 看起来会极大地影响 Swipe 组件的性能，因为涉及到大量的 isRtl() 调用，里面需要调用 getComputedStyle，会产生性能开销。

社区里 Swipe 组件一般都是怎么适配 RTL 的呢？感觉需要先做下调研

对这里进行了优化，只在initialize中进行一次调用