chore: straight forward replace of yarn with npm

[bhouston]

Why

Removes Yarn and just uses Npm. Reduces complexity without losing anything.

What

Removed all references to yarn and instead just use npm.

Checklist

• [x] Documentation updated
• [n/a] Storybook entry added
• [ ] Ready to be merged

I would like to see if the CI works. I believe that it can be optimized and I may do so after I see it run once on this new PR.

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[bhouston]

I've cleaned up the CI to be more similar to a template project of mine that is near optimal in terms of speed: https://github.com/bhouston/template-typescript-monorepo/actions

I also use .nvmrc to set the node version as well as specify "engines": node >= 18 in package.json