To use this package you must do npx create-rsc-app@latest my-app, to create a RSC (React Server Components) app, or, if you want also to have SSR (Server Side Rendering), you must type npx create-rsc-app@latest my-app --ssr.
Basically what this package does is to clone a github repository where a setup for RSC development is found. Then it removes remote origin and finally it installs node modules dependencies. The github repository it clones depends on the option passed --ssr. If it's not passed then this repository is cloned. If passed, then this repository instead is cloned.