Add Krippendorff's alpha bootstrapping with WASM and Gradio support.

Fix and enhance typing.

Update PyO3 and rust-numpy.

Add Gradio. Update PyO3, rust-numpy, and ndarray.

Add weights, new Bradley-Terry implementation, remove `Ignore`.

Implement `pairwise_scores` in Rust, add more benchmarks and tests.

Update docs, fix typing, and add performance benchmarks.