Implemented a LAPACKE_?langb interface

[ACSimon33]

Description

Following up on #722, I've implemented the LAPACKE_?langb interfaces. I've used the same trick as in LAPACKE_?lange where you interpret the matrix as transposed in row-major layout. Although the matrix is in band layout here, it works because it is a square matrix (correct me if I'm wrong). kl and ku are swapped in the row-major case due to the implicit transposition.

Does the documentation update itself via oxygen?

Closes #722

Checklist

• The documentation has been updated.
• If the PR solves a specific issue, it is set to be closed on merge.

[langou]

Following up on #722, I've implemented the LAPACKE_?langb interfaces. I've used the same trick as in LAPACKE_?lange where you interpret the matrix as transposed in row-major layout. Although the matrix is in band layout here, it works because it is a square matrix (correct me if I'm wrong). kl and ku are swapped in the row-major case due to the implicit transposition.

Well done!

Does the documentation update itself via [d]oxygen?

Good question. No, it does not update itself. When we release the new release (probably 3.11), then we (@julielangou) will update the documentation. We do not have any automagic way to update the doxygen documentation from the GitHub repo at each merge.