cnpm/npminstall ? reverse-engineered prompt

Build me a Node.js tool called npminstall that makes installing npm packages faster and easier than the normal npm install flow.

I want it to work both as a command line app and as a library. From the CLI, it should be able to install dependencies from a package.json, install a single package or version range, install from a folder, tarball, git url, or GitHub repo, and also support uninstall and symlinking a folder. It should handle global installs, save flags, production only installs, custom registries, China mirror mode, ignore scripts, optional dependencies, engine checks, license blocking, and a flatten mode for dependency layout.

Please make it behave like a real package manager for common npm cases, including bins, scoped packages, peer dependencies, workspaces, and postinstall scripts. Use a pnpm like store structure if that helps with speed and deduping. Node 20 and Python 3 should be the expected environment. If anything is unclear, look up the current docs online and follow the project README closely.