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
blas/ext/base/gapxsumpw	$\color{green}248/248$ $\color{green}+100.00\%$	$\color{green}16/16$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}248/248$ $\color{green}+100.00\%$
constants/float32/max-base10-exponent-subnormal	$\color{green}54/54$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}0/0$ $\color{green}+100.00\%$	$\color{green}54/54$ $\color{green}+100.00\%$
stats/base/cumax	$\color{green}287/287$ $\color{green}+100.00\%$	$\color{green}40/40$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}287/287$ $\color{green}+100.00\%$
strided/base/dtype-enum2str	$\color{green}103/103$ $\color{green}+100.00\%$	$\color{green}5/5$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}103/103$ $\color{green}+100.00\%$

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