feat: add blas/base/scabs1

[aman-095]

Description

This RFC proposes to add a routine to compute the sum of the absolute value of the real and imaginary part of a single-precision complex floating-point number as defined in BLAS scalar operations. Specifically adding @stdlib/blas/base/scabs1 is proposed.

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@stdlib-js/reviewers

[kgryte]

@aman-095 This PR is close. I had to do a decent amount of clean-up, including addressing copy-paste errors. What remains is updating the benchmark files and adding the C API documentation to the README.

[kgryte]

@aman-095 Thanks for making the changes. Anything else needing to be done? If not, you can go ahead and port the changes over to dcabs1 so we can get that one over the finish line, as well.

[aman-095]

Thanks, Athan, for reviewing. This seems fine to me. I'm also replicating this in dcabs1 and will push the changes soon.

[kgryte]

LGTM. Had to make a few more changes. Note that the dependencies for each configuration in a manifest.json file should include only those packages which are necessary for that build. Some of them had extraneous deps or were missing others. Will merge once CI passes.