Add segno package recipe and runtime tests

[anxkhn]

Summary

• add a new segno recipe (1.6.6) as a pure Python wheel
• set package metadata (home, PyPI, summary, license, maintainer)
• add import smoke test in recipe metadata
• add package runtime tests in packages/segno/test_segno.py

Why

segno is a useful QR Code and Micro QR Code generator that fits Pyodide packaging well:

• pure Python distribution
• no native extension dependency chain
• useful for browser-only workflows and demos

Testing

Built recipe locally:

• pyodide build-recipes segno --install --log-dir build-logs

Prepared runtime:

• ./tools/copy_pyodide_runtime.sh ./dist

Ran package tests:

• pytest -v --dist-dir=./dist --runner=selenium --rt chrome packages/segno/test_segno.py

Result:

• 2 passed

Closes #556

[github-actions]

Package Build Results

Total packages built: 24
Total build time: 0:05:17

Package Build Times (click to expand)

Package	Build Time
libopenblas	4m 49s
libf2c	28s
cffi	12s
regex	9s
MarkupSafe	4s
atomicwrites	3s
pycparser	3s
pydoc_data	3s
py	1s
pytest-asyncio	1s
segno	1s
Jinja2	1s
pytest	1s
more-itertools	1s
exceptiongroup	1s
setuptools	1s
micropip	1s
pluggy	1s
pyparsing	1s
pytz	1s
iniconfig	1s
attrs	1s
tblib	1s
six	1s

Longest build: libopenblas (4m 49s)
Packages built in more than 10 minutes: 0

[ryanking13]

As this is a pure python package, you should be able to install it directly from PyPI without adding it to Pyodide lockfile. Is there a specific reason you want to add it here?