[feature] CLI for env and app management

[fritzduchardt]

A bunch of CLI commands would make usage of myks easier, e.g.:

• delete env : removes and environment and its renderings.
• add env : adds the env folder and a rudimentary env.yaml
• delete app : removes an app and its renderings
• add app : adds the app folder and modifies env.yaml
• add baseapp : adds the base app plus base app scaffolding

[Zebradil]

Who is going to work on this? It is assigned to @kbudde, but @fritzduchardt recently said that he can pick it up. I just want to make sure you guys don't do double work 🤗

[kbudde]

@fritzduchardt what are you planning to do?

I was looking into https://github.com/charmbracelet/huh for scaffolding new prototypes but did not do anything so far.

[Zebradil]

Oh, that looks nice 👍

[fritzduchardt]

This looks neat, in particular, if you create a UI to fill in the vendir.yaml. Please feel free to take over the issue. I might instead focus on doing auto-completion for the render and sync step.