pybedtools: Add version 0.12.1

[luhenry]

• Package: pybedtools
• Version: 0.12.1
• Source: https://github.com/daler/pybedtools
• Docs: https://github.com/daler/pybedtools

Compiles pybedtools' Cython extensions (cbedtools, featurefuncs), which wrap ~640 lines of BEDTools' own legacy C++ (BED/GFF file-type sniffing, gzip streaming) linked against system zlib/libstdc++; the actual bedtools command-line toolkit stays an external runtime dependency invoked via subprocess, never vendored or compiled here. Upstream publishes no riscv64 wheel.

Mirrors the build-wheels job of upstream's main.yml.

Differs from upstream

• One manylinux_riscv64 image instead of x86_64/aarch64/macOS - no Windows job existed to drop (upstream already skips *-win*).
• Added a CIBW_TEST_COMMAND - upstream's wheel job runs no tests at all; this one imports the compiled extension and builds an Interval.

Matrix: cp312/cp313/cp314 - numpy floors at cp312, and pandas (a runtime dep) has no cp314t wheel on the registry.

Testing

• upstream's wheel-build job runs no tests; added a minimal import + Interval construction against numpy/pysam from the registry.

License: OK

Built locally on cp311 (x86_64): cythonize + wheel build succeed, install + the smoke import/Interval check pass.

[github-actions]

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