Add scipy-tests

[jjerphan]

Template A: Checklist for adding a package

Pre-submission Checks

• Package requires building for emscripten-wasm32 platform (not a noarch package), in other words, the package requires compilation.

scipy-tests is an additional output of the existing scipy recipe (not a new recipes/recipes_emscripten/scipy-tests/ directory). It overlays SciPy's test modules, including any wasm test extensions, onto site-packages/scipy.

Recipe Structure

Added recipes/recipes_emscripten/[package-name]/recipe.yaml with proper structure:

• context section with version (and optionally name)
• package section with name and version using Jinja2 templates
• source section with:
  • Source URL is valid and points to archive file (.tar.gz, .tar.bz2, .tar.xz, .tgz, or .zip)
  • Source URL contains ${{ version }} template for version updates
  • SHA256 hash is correct (verified with curl -sL <url> | sha256sum)
  • Patches (if any) are included in [package-name]/patches/ directory
• build section with appropriate script/method
  • Python packages: ${PYTHON} -m pip install . ${PIP_ARGS}
  • R packages: $R CMD INSTALL $R_ARGS .
  • C++ packages: Uses emcmake/emmake or emconfigure/emmake
  • Rust packages: Uses rust-nightly and maturin or appropriate Rust build tool
  • Build number is 0
  • If the script is longer than 3 lines, a build.sh is included
• requirements section (build, host, run as needed)
• tests section
  • Python packages: test_import_[package].py file created and referenced
  • C++ packages: Test executable or package_contents test
  • R packages: Package contents test
• about section with license, homepage, summary

Build number is 2 for both scipy and scipy-tests (the template's "0" is for a brand-new recipe). Tests are package_contents plus test_scipy_tests.py (overlay check), not test_import_scipy-tests.py. Source URL, SHA256, and patches are unchanged from the existing scipy recipe.

PR Formatting

• PR title follows format: Add [package-name] or Update [package-name] to [version]
• PR description includes:
  • Version being added/updated
  • Any special build considerations or patches applied

Package Details

• Package Name: scipy-tests
• Version: 1.18.0

Build Notes

One SciPy build, two packages: scipy stays runtime-only; scipy-tests ships the test modules. Other recipes can add scipy-tests as a test requirement and call scipy.test(). scipy-tests depends on the matching scipy build, plus pytest, hypothesis, and gmpy2. Meson is invoked with --tags=runtime,python-runtime,tests so the test files exist to package.