[Feature] Install plugin directly after creation

[md-weber]

I believe currently this is not happening and because I could not list the plugins I was unsure if the plugin has been installed directly.

It would be great if I create a new plugin that it is automatically installed in the CLI from where I create the plugin from. Maybe it is worth to ask the user if he wants to install it in the current CLI.

Example Steps I did:

• cm sidekick plugins create --name xxx_sidekick_plugin -t shared-code
• cm sidekick plugins install -s path ~/codemagic_sidekick_plugin/