feat(cli): add basic setup for ragbits CLI

[mhordynski]

Feature description

Create new package ragbits-cli which will install new command ragbits (or rbts for short).

ragbits-cli package will consist:

• typer basic setup
• an autodiscovery method which will iterate over other ragbits packages and look for cli module / package
  • when cli package is found register(app: Typer) -> None: is called with current typer instance.
  • any ragbits module can define this method to enrich cli with tools specific to given package
  • typically ragbits packages will install it's own subapp to the typer (for example rbts document-search <command> in document-search package)
• any CLI utilities / helper functions that may be reused in other parts of application
• dependencies required to create TUI

Motivation

One of the ragbits unique values is a rich collection of CLI utilities available through ragbits / rbts command.

Additional context

No response

[micpst]

Just to clarify, will ragbits-cli be a brand new package or we're gonna use our current ragbits-dev-kit and just change its name?