Add libnacl

[maresb]

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.
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[github-actions]

Hi! This is the staged-recipes linter and your PR looks excellent! 🚀

[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/libnacl-python-bindings/recipe.yaml) and found some lint.

Here's what I've got...

For recipes/libnacl-python-bindings/recipe.yaml:

• ❌ The recipe must have a build/number section.
• ❌ license_file entry is missing, but is required.

For recipes/libnacl-python-bindings/recipe.yaml:

• ℹ️ PyPI default URL is now pypi.org, and not pypi.io. You may want to update the default source url.

_{This message was generated by GitHub Actions workflow run https://github.com/conda-forge/conda-forge-webservices/actions/runs/12961822463. 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/libnacl-python-bindings/recipe.yaml) and found it was in an excellent condition.

[maresb]

@conda-forge/help-python, ready for review!

Despite being a Python interface to a C library, no compilation is involved, so this is noarch.

[maresb]

Unblocks #28932

[maresb]

Huge thanks for all the recipes you've been reviewing and merging for me lately @ocefpaf!!!

I don't want to spam you with thanks every time, but I appreciate it every time! 🙏