Migrate monorepo to workspaces

[jameschensmith]

All the popular package managers now have some level of support for workspaces (npm, yarn, pnpm). For additional power, one could also use tools like Lerna, Nx, Rush, Turbo, etc.

I've personally used npm workspaces, I've also migrated projects to npm workspaces, and I think it would be a welcome improvement to the current monorepo setup. If more monorepo functionality is desired, most of the tooling out there either integrates well with the workspaces package configuration or builds on top of it.