📝 Documentation: Add an npm2yarn equivalent for installation instructions in docs site

Bug Report Checklist

• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Overview

The three code blocks under Installation on the docs site are a lot of vertical space:

It'd be nice to use something like the popular @docusaurus/remark-plugin-npm2yarn to turn that into a single tabbed area. Accepting PRs!

Additional Info

An example of the npm2yarn plugin in the wild is on https://typescript-eslint.io/getting-started/#step-1-installation:

...though npm2yarn, as its name suggests, doesn't seem to support pnpm in that tab example. Maybe a new package needs to be made? Or a configuration option added somewhere?

I haven't found any TypeDoc plugin that does this (though admittedly I haven't looked very hard). I think finding an existing plugin would be the best solution, or if one doesn't exist creating it. That way other folks can benefit from this!

Start at the docs site's Installation section and compare its current npm, yarn, and pnpm code blocks with the referenced npm2yarn example. Investigate whether an existing TypeDoc or npm2yarn-compatible solution supports pnpm; done means the installation instructions appear in one tabbed area without losing package-manager coverage.