[cmd] - Move the CLI root command to its own package

[Minosity-VR]

What does this PR do?

Enhancement:

Move the root command to its own package. This allows it to be imported directly to ease custom attack techniques development and integration.

Motivation

The current way of using Stratus Red Team programatically is to import it as a dependency. This is great to use it in a broader program, but doesn't allow to quickly expand its usage by adding new attack techniques but keeping the same CLI.

With this change, it is possible to easily import the root command, add custom attack techniques and rebuild the CLI to have both the native attacks and the your custom ones

QA Instructions

• make test
• docker build .
• terraform fmt -recursive -check in v2/internal/attacktechniques - skipped, not relevant
• stratus list shows all the attacks