[Feature] Implement LARS optimizer

[kozistr]

Problem (Why?)

Implement LARS optimizer

Solution (What/How?)

• Implement LARS optimizer

Other changes (bug fixes, small refactors)

nope

Notes

nope

[codecov-commenter]

Codecov Report

Merging #50 (9fadf57) into main (16aeb2c) will increase coverage by 0.22%.
The diff coverage is 92.72%.

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
+ Coverage   86.93%   87.16%   +0.22%     
==========================================
  Files          25       26       +1     
  Lines        1738     1792      +54     
==========================================
+ Hits         1511     1562      +51     
- Misses        227      230       +3     

Impacted Files	Coverage Δ
pytorch_optimizer/version.py	0.00% <0.00%> (ø)
pytorch_optimizer/lars.py	94.00% <94.00%> (ø)
pytorch_optimizer/__init__.py	100.00% <100.00%> (ø)
pytorch_optimizer/optimizers.py	96.07% <100.00%> (+0.24%)	⬆️

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