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
array/base/flatten2d	$\color{green}243/243$ $\color{green}+100.00\%$	$\color{green}15/15$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}243/243$ $\color{green}+100.00\%$
array/base/flatten3d-by	$\color{green}296/296$ $\color{green}+100.00\%$	$\color{green}21/21$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}296/296$ $\color{green}+100.00\%$
array/base/fliplr3d	$\color{green}203/203$ $\color{green}+100.00\%$	$\color{green}9/9$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}203/203$ $\color{green}+100.00\%$
array/base/zeros2d	$\color{green}293/293$ $\color{green}+100.00\%$	$\color{green}11/11$ $\color{green}+100.00\%$	$\color{green}3/3$ $\color{green}+100.00\%$	$\color{green}293/293$ $\color{green}+100.00\%$
array/place	$\color{red}296/298$ $\color{green}+99.33\%$	$\color{red}28/29$ $\color{green}+96.55\%$	$\color{green}3/3$ $\color{green}+100.00\%$	$\color{red}296/298$ $\color{green}+99.33\%$
assert/has-btoa-support	$\color{green}131/131$ $\color{green}+100.00\%$	$\color{red}7/8$ $\color{green}+87.50\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}131/131$ $\color{green}+100.00\%$
blas/base/dasum	$\color{green}359/359$ $\color{green}+100.00\%$	$\color{green}17/17$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}359/359$ $\color{green}+100.00\%$
blas/ext/base/dapxsumkbn	$\color{green}392/392$ $\color{green}+100.00\%$	$\color{green}21/21$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}392/392$ $\color{green}+100.00\%$
iter/do-while-each	$\color{red}225/228$ $\color{green}+98.68\%$	$\color{red}21/22$ $\color{green}+95.45\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{red}225/228$ $\color{green}+98.68\%$
slice/base/nonreduced-dimensions	$\color{green}102/102$ $\color{green}+100.00\%$	$\color{green}5/5$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}102/102$ $\color{green}+100.00\%$
stats/levene-test	$\color{green}470/470$ $\color{green}+100.00\%$	$\color{green}57/57$ $\color{green}+100.00\%$	$\color{green}6/6$ $\color{green}+100.00\%$	$\color{green}470/470$ $\color{green}+100.00\%$
string/base/dotcase	$\color{red}571/576$ $\color{green}+99.13\%$	$\color{red}17/18$ $\color{green}+94.44\%$	$\color{red}5/6$ $\color{green}+83.33\%$	$\color{red}571/576$ $\color{green}+99.13\%$

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