docs: Add Radiate to README examples section

[pkalivas]

This PR adds Radiate to the “Examples” section of the README.

This is a documentation-only change.

For some context: radiate serves as a great example of a large-scale, multi-crate rust project fully integrated with Python through PyO3. Its Python package executes almost all core logic (in some cases, all) in Rust, therefore achieving near-native Rust performance, while providing a clean, idiomatic Python API. Below are a few project highlights and relevant links.

Highlights

• Comprehensive support for genetic algorithms, genetic programming, and neuroevolution
• Multi-objective optimization, novelty search, and speciation
• First-class, built-in metric tracking and parallel evolution (supports GIL & no GIL)
• Distributed as both a Rust crate and a Python package

Links

• Crate: crates.io/crates/radiate
• PyPI: pypi.org/project/radiate
• User Guide: pkalivas.github.io/radiate
• GitHub: github.com/pkalivas/radiate

PR or not, big thanks to the PyO3 team for creating/maintaining such a great ecosystem - radiate's python integration relies entirely on PyO3/maturin and wouldn't be possible without it. Please let me know if I can add any extra color here or provide any more information!

[davidhewitt]

Thanks, I'm glad you've had a great experience using PyO3!