feat(MultiImageViewer): implement RTL support for MultiImageViewer co…

[SnakeLil]

Resolved the RTL compatibility issue mentioned in
https://github.com/ant-design/ant-design-mobile/issues/6727#issuecomment-2603546837

• Add right-to-left layout compatibility for dir attribute usage
• Handle mirrored positioning and gesture behavior in RTL mode

[github-actions]

[zombieJ]

CI failed. pls check

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.68%. Comparing base (d1f4dd4) to head (8b0bb36).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/utils/get-is-rtl.ts	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6848      +/-   ##
==========================================
- Coverage   92.69%   92.68%   -0.02%     
==========================================
  Files         335      336       +1     
  Lines        7217     7227      +10     
  Branches     1816     1825       +9     
==========================================
+ Hits         6690     6698       +8     
- Misses        491      493       +2     
  Partials       36       36              

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