docs: update related packages sections

[stdlib-bot]

This PR

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

[kgryte]

/stdlib merge

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
array/base/ones2d	$\color{green}293/293$ $\color{green}+100.00\%$	$\color{green}11/11$ $\color{green}+100.00\%$	$\color{green}3/3$ $\color{green}+100.00\%$	$\color{green}293/293$ $\color{green}+100.00\%$
blas/ext/base/sapxsumors	$\color{green}393/393$ $\color{green}+100.00\%$	$\color{green}30/30$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}393/393$ $\color{green}+100.00\%$
string/base/reverse-grapheme-clusters	$\color{green}127/127$ $\color{green}+100.00\%$	$\color{green}6/6$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}127/127$ $\color{green}+100.00\%$

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