refactor: the implementation of dragger

[zxyao145]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• Bundle size optimization
• Performance optimization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	refactor: the implementation of dragger
🇨🇳 Chinese	修改 Dragger 的实现方法

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Changelog is provided or not needed

[github-actions]

[codecov]

Codecov Report

Attention: 131 lines in your changes are missing coverage. Please review.

Comparison is base (bdc1e4f) 43.59% compared to head (bf1038b) 43.57%.
Report is 4 commits behind head on master.

Files	Patch %	Lines
...omponents/core/JsInterop/modules/dom/dragHelper.ts	0.00%	129 Missing ⚠️
components/select/Select.razor	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3647      +/-   ##
==========================================
- Coverage   43.59%   43.57%   -0.03%     
==========================================
  Files         572      572              
  Lines       27634    27649      +15     
  Branches     5621     5622       +1     
==========================================
+ Hits        12046    12047       +1     
- Misses      14592    14607      +15     
+ Partials      996      995       -1     

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