Dependency clean-up + updated docs

[toastal]

• Update Flake
• Remove husky & lint-staged as they run arbitrary code in the environment
• NPM Packaging
  • Update packages
  • Reorganize the package.json key order to something more sensible
  • Move several should-be devDependencies from dependencies
• Update README with further clarity after doing a setup
• Add default.nix so project can be add-root’d