Add dalphaball

[gieses]

This adds DAlphaBall, a tool for computing the surface area and volume of unions of many balls.

Connected PRs

---

Language	Name of review team
c/c++	@conda-forge/help-c-cpp
other	@conda-forge/staged-recipes

Checklist

• Title of this PR is meaningful: e.g. "Adding my_nifty_package", not "updated meta.yaml".
• License file is packaged (see here for an example).
• Source is from official source.
• Package does not vendor other packages. (If a package uses the source of another package, they should be separate packages or the licenses of all packages need to be packaged).
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• Build number is 0.
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[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/dalphaball/meta.yaml) and found some lint.

Here's what I've got...

For recipes/dalphaball/meta.yaml:

• ❌ The license item is expected in the about section.
• ❌ This recipe is using a compiler, which now requires adding a build dependence on {{ stdlib("c") }} as well. Note that this rule applies to each output of the recipe using a compiler.
• ❌ package.version has a value that is interpreted as a floating-point number. Please quote it (like "1.0" or "{{ var }}") to ensure that it is interpreted as string and preserved exactly.

_{This message was generated by GitHub Actions workflow run https://github.com/conda-forge/conda-forge-webservices/actions/runs/25307854763. Examine the logs at this URL for more detail.}

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/dalphaball/meta.yaml) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipes/dalphaball/meta.yaml:

• ℹ️ License is not an SPDX identifier (or a custom LicenseRef) nor an SPDX license expression.

Documentation on acceptable licenses can be found here.

_{This message was generated by GitHub Actions workflow run https://github.com/conda-forge/conda-forge-webservices/actions/runs/25308657008. Examine the logs at this URL for more detail.}

[gieses]

@conda-forge/help-c-cpp / @conda-forge/staged-recipes, ready for review!