Add VariableBlurEffect

[Kyle-Ye]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 24.67%. Comparing base (9ebe77e) to head (85e4c4e).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...tUICore/Graphic/BlurStyle/VariableBlurEffect.swift	0.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #494      +/-   ##
==========================================
- Coverage   24.69%   24.67%   -0.02%     
==========================================
  Files         473      474       +1     
  Lines       27454    27463       +9     
==========================================
- Hits         6780     6777       -3     
- Misses      20674    20686      +12     

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