feat(zero_order): implemented the zero order feature

[JieRen98]

No description provided.

[codecov-commenter]

Codecov Report

Base: 65.58% // Head: 60.37% // Decreases project coverage by -5.21% ⚠️

Coverage data is based on head (a470a67) compared to base (5f4680e).
Patch coverage: 40.78% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #93      +/-   ##
==========================================
- Coverage   65.58%   60.37%   -5.22%     
==========================================
  Files          37       38       +1     
  Lines        1906     2102     +196     
==========================================
+ Hits         1250     1269      +19     
- Misses        656      833     +177     

Flag	Coverage Δ
unittests	60.37% <40.78%> (-5.22%)	⬇️

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Impacted Files	Coverage Δ
torchopt/__init__.py	100.00% <ø> (ø)
torchopt/accelerated_op/adam_op.py	75.00% <ø> (ø)
torchopt/zero_order_diff.py	9.69% <9.69%> (ø)
torchopt/distributed/api.py	25.87% <22.22%> (ø)
torchopt/optim/meta/base.py	62.50% <28.57%> (ø)
torchopt/base.py	77.27% <50.00%> (-0.99%)	⬇️
torchopt/linalg.py	91.78% <80.00%> (ø)
torchopt/transform.py	81.07% <88.23%> (ø)
torchopt/implicit_diff.py	94.28% <96.00%> (+0.19%)	⬆️
torchopt/alias.py	78.07% <100.00%> (ø)
... and 4 more

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