Plan to port Evolutionary Strategy algorithm

This is a port of the work by: Krzysztof Choromanski, Mark Rowland, Vikas Sindhwani, Richard E. Turner, Adrian Weller: "Structured Evolution with Compact Architectures for Scalable Policy Optimization", https://arxiv.org/abs/1804.02395

This plan will follow 3 main steps:
1. Port existing codebase
2. Add type annotations and idioms along ml-compiler-opt codebase
3. Create training pipeline for Evolutionary Strategy