You can check out this free and open-source rails starter kit that I'm working on

Github - https://github.com/tarunvelli/rails-tabler-starter

Demo - https://rails-tabler.fly.dev/

Looks great!

I'm working on a similar starter kit for rails here https://github.com/tarunvelli/rails-tabler-starter

I don't know much about Rails. But how easy is it to add a CLI, where users can select the options they want and get a scaffold generated with those specifically.

Rails comes with a CLI scaffold generator, which can be customized too.

I think that’s called Rails

Ruby on Rails starter built using Tabler, mostly use it to quickly build and abandon ideas

https://github.com/tarunvelli/rails-tabler-starter

I'm working on a free and opensource Rails 7 starter kit currently that comes with

- User authentication & authorization - Background worker & scheduler - Roles & permissions management - Pre built UI layouts and themes

https://github.com/tarunvelli/rails-tabler-starter

You should look at https://github.com/filamentphp/filament - if anything could be a good starting point.