feat: add C ndarray API and refactor blas/ext/base/dsumkbn

[headlessNode]

Description

What is the purpose of this pull request?

This pull request:

• add C ndarray API and refactor blas/ext/base/dsumkbn

Related Issues

Does this pull request have any related issues?

No.

Questions

Any questions for reviewers of this pull request?

No.

Other

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

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

---

@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
blas/ext/base/dsumkbn	$\color{green}388/388$ $\color{green}+100.00\%$	$\color{green}21/21$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}388/388$ $\color{green}+100.00\%$

The above coverage report was generated for the changes in this PR.

[headlessNode]

CI failure from a downstream test suite.

[stdlib-bot]

PR Commit Message

feat: add C `ndarray` API and refactor `blas/ext/base/dsumkbn`

PR-URL: https://github.com/stdlib-js/stdlib/pull/3530

Co-authored-by: Athan Reines <kgryte@gmail.com>
Signed-off-by: Athan <kgryte@gmail.com>
Signed-off-by: Muhammad Haris <101793258+headlessNode@users.noreply.github.com>

Please review the above commit message and make any necessary adjustments.

[kgryte]

As the CI failure is expected, I'll go ahead and merge.