feat(PullRefresh): add a maxPullDistance param to enable cancellation

[CoderMonkie]

In pull-refresh component

I add a max-pull-distance prop to enable cancellation of pull refresh.

If not passed this prop, the behavior will keep the same as before.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 26.66667% with 11 lines in your changes missing coverage. Please review.

Project coverage is 89.62%. Comparing base (ec5b45b) to head (961be08).
Report is 97 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/vant/src/pull-refresh/PullRefresh.tsx	26.66%	8 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13484      +/-   ##
==========================================
+ Coverage   89.60%   89.62%   +0.02%     
==========================================
  Files         257      257              
  Lines        7013     7046      +33     
  Branches     1736     1747      +11     
==========================================
+ Hits         6284     6315      +31     
- Misses        384      385       +1     
- Partials      345      346       +1     

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