v1: python-rtmidi 1.5.8

First release: python-rtmidi 1.5.8 for CPython 3.13, 3.14 and free-threaded 3.14t, on Linux, macOS and Windows.

python-rtmidi 1.5.8, built from commit fc1cd1c by https://github.com/paperisiili/python-rtmidi-wheels/actions/runs/33309225801.
Wheel digests are in SHA256SUMS, and each wheel carries a sigstore attestation:
gh attestation verify <wheel> --repo paperisiili/python-rtmidi-wheels.
The bundled jack2's exact source tree is attached.