Fix d2k function

[tpurcell90]

Need to use the transpose of the inverse matrix for recipmatrix

Summary

Major changes:

• fix 1: FHI-aims k-grid sizes from a density

Checklist

• Google format doc strings added. Check with ruff.
• Type annotations included. Check with mypy.
• Tests added for new features/fixes.
• If applicable, new classes/functions/modules have duecredit @due.dcite decorators to reference relevant papers by DOI (example)

Tip: Install pre-commit hooks to auto-check types and linting before every commit:

pip install -U pre-commit
pre-commit install

[tpurcell90]

Any updates on if this can get merged in?

[janosh]

thanks @tpurcell90! 👍 could you add a test that fails without this fix?

[tpurcell90]

Test added via static-no-kgrid-si test.

Unit test can also be added if you prefer that too

[janosh]

thanks! 👍