chore: 🔧 clean up workspace, add utils [skip ci]

[ecxyzzy]

Summary

• Changed version specifiers for all internal packages to workspace:^.
• Moved all workspace root devDependencies to full dependencies and removed production deployment shim. Also added ignore-workspace-root-check to the .npmrc so pnpm won't complain when trying to install a dependency in the workspace root.
  • I was going to add @manypkg/cli, but they change the version specifier for all packages (even internal) from workspace:^ to the actual version, which is not ideal for our usecase.
• Moved sleep and notNull to a new package @libs/utils.
• Added @typescript-eslint/consistent-type-imports, which enforces the import type syntax for type imports, to the eslintrc, and relinted the repo.
• Added .then() to async entrypoints, and removed dummy then callbacks (e.g. (() => [])).

Issues

Closes #89; closes #90.

[ap0nia]

I'm not too opinionated on devops atm, so I think it's fine to implement whatever changes you're interested in, and then open up a discussion later if that's desired. 👍