RFC: add BLAS(-like) routine `saxpby`

[kgryte]

Checklist

Please ensure the following tasks are completed before submitting a feature request.

• [X] Read and understood the Code of Conduct.
• [X] Searched for existing issues and pull requests.
• [X] The issue name begins with RFC:.

Description

Description of the feature request.

This RFC proposes to add a BLAS-like routine to compute a*x + b*y as defined in MKL for single-precision floating-point numbers. Specifically adding @stdlib/blas/base/saxpby is proposed.

Related Issues

Does this feature request have any related issues?

No.

Questions

Any questions for reviewers?

No.

Other

Any other information relevant to this feature request? This may include screenshots, references, sample output, and/or implementation notes.

No.