🦾 Added EvoTransformer ES & Small Fixes

[v0.1.6] - [03/2024]

Added

• Implemented Hill Climbing strategy as a simple baseline.
• Adds use_antithetic_sampling option to OpenAI-ES.
• Added EvoTransformer and EvoTF_ES strategy with example trained checkpoint.

Fixed

• Gradientless Descent best member replacement.

Changed

• SNES import DES weights directly and reuses code
• Made Sep_CMA_ES and OpenAI-ES use vector sigmas for EvoTransformer data collection.