Update Animatable API and implementation

[Kyle-Ye]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 5.88235% with 48 lines in your changes missing coverage. Please review.

Project coverage is 22.04%. Comparing base (c39a762) to head (1eb129d).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ftUICore/View/Animation/Animation/Animatable.swift	0.00%	34 Missing ⚠️
...iftUICore/View/Animation/Animation/Animation.swift	17.64%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #309      +/-   ##
==========================================
- Coverage   22.07%   22.04%   -0.04%     
==========================================
  Files         349      348       -1     
  Lines       17273    17304      +31     
==========================================
+ Hits         3813     3814       +1     
- Misses      13460    13490      +30     

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