Refine npm registry documentation for clarity

[Genofogu]

Updated formatting and improved clarity in the documentation for working with the npm registry. Adjusted sections on authentication, publishing limits, and package installation.

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Source	Review	Production	What Changed
packages/working-with-a-github-packages-registry/working-with-the-npm-registry.md

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[Genofogu]

[Sharra-writes]

@Genofogu No thanks, this doesn't make substantive improvements and is also lighting up basically all our checks. Too much work to get those ironed out for too little gain.