Various Improvements

[MrHedmad]

There are a few "technical debt"-y things that would be nice to fix:

• Unit testing is still very limited, and more time could be used to generally add tests.
• The code can be significantly refactored and made easier.
  • The execution module can be made better by breaking down long functions.
  • A mini-SDK over docker or podman to interact with them more safely.
  • A way (mutexes?) to hook into the CTRL-C binding without having to pass it as an argument everywhere.
  • Many functions have a ton of arguments. They could be condensed to a much safer and convenient struct, especially the functions that get called when a command is executed (so we use the same struct both in the signature and in the CLI, if we are smart enough).
  • Many functions are LONG. They should be broken up into testable bits and tested (see point above).

If more "smaller" thoughts come up, we can add them to this issue.

[MrHedmad]

The global CTRL-C hook maybe done with lazy_static, so that we allocate a static ref but that is initialized at runtime. It runs the hook creation logic just the one time and returns the binding as a static.