add OP3 experiment config

[hakuturu583]

• add op3_walking experiment

[codecov]

Codecov Report

Attention: Patch coverage is 17.85714% with 23 lines in your changes missing coverage. Please review.

Project coverage is 78.04%. Comparing base (96ad28f) to head (fe7f694).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...sis_ros/ppo/config/op3_walking/reward_functions.py	8.33%	22 Missing ⚠️
genesis_ros/ppo/config/op3_walking/entities.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #17      +/-   ##
==========================================
- Coverage   79.97%   78.04%   -1.93%     
==========================================
  Files          22       24       +2     
  Lines         874      902      +28     
==========================================
+ Hits          699      704       +5     
- Misses        175      198      +23     

Flag	Coverage Δ
pytest	78.04% <17.85%> (-1.93%)	⬇️

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