Add reusable genetic optimizer framework

[xsa-dev]

Summary

• add a reusable optimization module that provides a generic Genome trait and genetic algorithm engine
• expose the new optimizer from the crate root and add the rand dependency required for stochastic search
• rewrite the GA example to use the framework with a synthetic evaluator that demonstrates universal strategy optimization
• document the genetic optimizer usage and GA example workflow in the README

Testing

• rustfmt --edition 2021 src/optimization/mod.rs examples/ga_optimize.rs src/lib.rs
• cargo fmt
• cargo test (fails: network error 403 while fetching hyperliquid_rust_sdk)

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https://chatgpt.com/codex/tasks/task_e_68f94ba6558c832b8583dc8988c04bcd

[chatgpt-codex-connector]

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