docs: update related packages sections

[stdlib-bot]

This PR

• updates the related packages section of READMEs to include links to related packages.

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
assert/is-skew-symmetric-matrix	$\color{green}115/115$ $\color{green}+100.00\%$	$\color{green}9/9$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}115/115$ $\color{green}+100.00\%$

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

[kgryte]

Closing as the changes have been discarded. I've updated the namespace database.