Update PyO3 to 0.25.1; add PyPy 3.11 support

[MarshalX]

closes #61

i will add Python 3.14 once it will be released (in ~october)

[codspeed-hq]

CodSpeed Performance Report

Merging #63 will improve performances by 36.31%

_{Comparing update-pyo3 (621a096) with main (5b18a35)}

Summary

⚡ 2 improvements
✅ 190 untouched benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	test_dag_cbor_encode_real_data[canada.json]	18.5 ms	13.5 ms	+36.31%
⚡	test_dag_cbor_encode_real_data[github.json]	616.6 µs	548.2 µs	+12.48%

[MarshalX]

@davidhewitt hi! i am pinging you in case you are interesting to see some perf improvement between 0.23.3 and 0.25.1 (mostly comes from 0.24 i guess)

⚡ Huge boost for encoding of canada.json (containing a huge number of 2-element arrays holding floating-point coordinate pairs). Good one! I hope this is not false positive

The decoding is exactly the same. And no other dramatic changes noticed.

[davidhewitt]

Wow very satisfying, thanks for sharing!