fix(Picker): emit scrollInto when pass through each option

[nemo-shen]

fix: #12457

🚧 Under Development!

Cases

• should emit scrollInto when click option
• should emit scrollInto when touch move picker

Effect

CleanShot.2024-02-04.at.21.27.49.mp4

Jobs

• Implement effect
• add demo
• update readme
• add test cases
• improve code

[codecov-commenter]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (989a90a) 89.79% compared to head (8349a20) 89.76%.

Files	Patch %	Lines
packages/vant/src/picker/PickerColumn.tsx	76.19%	1 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12621      +/-   ##
==========================================
- Coverage   89.79%   89.76%   -0.03%     
==========================================
  Files         257      257              
  Lines        6830     6851      +21     
  Branches     1657     1662       +5     
==========================================
+ Hits         6133     6150      +17     
+ Misses        373      372       -1     
- Partials      324      329       +5     

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