[FEATURE REQUEST] Generate docs for pure "click" too

[senpos]

Hi!

Autogenerating docs for CLI app in markdown is absoluetly awesome feature!

I miss it a lot in pure click. :( I have a bunch of apps which are not likely to be rewritten with typer for now, as they are in production and work fine, but having documentation for them would help a lot.

As I can see, documentation is built mostly from click's internal objects. Do you have any plans on improving typer-cli to support click apps too? Or perhaps making a separate CLI for that purpose? 🤔 As it seems to be a bit out of scope of the typer-cli. But that would enable this package to be used in many more projects, as click is widely used.

Thanks!