fix: dgemm not handling conjugate-transpose

[dhruvan2006]

Description

What is the purpose of this pull request?

dgemm does not handle conjugate-transpose explicitly since the if conditions only checked if transA === 'transpose' which is dangerous.
Therefore, I decided to implement the TODO:s and refactored isTransposed function into a new package.

Questions

Any questions for reviewers of this pull request?

No.

Other

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No.

Checklist

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

• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

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[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
blas/base/assert/is-transposed	$\color{green}99/99$ $\color{green}+100.00%$	$\color{green}4/4$ $\color{green}+100.00%$	$\color{green}1/1$ $\color{green}+100.00%$	$\color{green}99/99$ $\color{green}+100.00%$
blas/base/dgemm	$\color{green}813/813$ $\color{green}+100.00%$	$\color{green}117/117$ $\color{green}+100.00%$	$\color{green}7/7$ $\color{green}+100.00%$	$\color{green}813/813$ $\color{green}+100.00%$
blas/base/dgemv	$\color{red}723/724$ $\color{green}+99.86%$	$\color{red}115/116$ $\color{green}+99.14%$	$\color{green}5/5$ $\color{green}+100.00%$	$\color{red}723/724$ $\color{green}+99.86%$
blas/base/ggemm	$\color{red}1283/1292$ $\color{green}+99.30%$	$\color{red}170/173$ $\color{green}+98.27%$	$\color{green}12/12$ $\color{green}+100.00%$	$\color{red}1283/1292$ $\color{green}+99.30%$
blas/base/ggemv	$\color{red}635/637$ $\color{green}+99.69%$	$\color{red}98/100$ $\color{green}+98.00%$	$\color{green}4/4$ $\color{green}+100.00%$	$\color{red}635/637$ $\color{green}+99.69%$
blas/base/sgemm	$\color{green}814/814$ $\color{green}+100.00%$	$\color{green}117/117$ $\color{green}+100.00%$	$\color{green}7/7$ $\color{green}+100.00%$	$\color{green}814/814$ $\color{green}+100.00%$
blas/base/sgemv	$\color{red}725/726$ $\color{green}+99.86%$	$\color{red}115/116$ $\color{green}+99.14%$	$\color{green}5/5$ $\color{green}+100.00%$	$\color{red}725/726$ $\color{green}+99.86%$

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

[kgryte]

Mind splitting this into two separate PRs? One PR which only implements the assertion utility and then another PR which makes the changes in the downstream packages? This ensures we have a clean commit history on merge.

[dhruvan2006]

Mind splitting this into two separate PRs? One PR which only implements the assertion utility and then another PR which makes the changes in the downstream packages? This ensures we have a clean commit history on merge.

Opened #11110 and #11111