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
net/http-server	$\color{red}362/366$ $\color{green}+98.91\%$	$\color{red}49/51$ $\color{green}+96.08\%$	$\color{green}5/5$ $\color{green}+100.00\%$	$\color{red}362/366$ $\color{green}+98.91\%$

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

[kgryte]

The CI failures are not due to changes introduced in this PR. As such, I'll go ahead and merge.