[EPIC] integrate pre-flight and setup code

[gbraad]

Introduce pre-flight and setup code for all platforms and hypervisors we support:

Stage 1

• Linux (Libvirt) Add basic pre-flight checks and setup (Linux / Libvirt) #6
• macOS (VirtualBox) Add basic pre-flight checks and setup (macOS / VirtualBox) #7

Stage 2

• Windows (Hyper-V) Add basic pre-flight checks and setup (Windows / Hyper-V) #8
• macOS (Hyperkit) Add basic pre-flight checks and setup (macOS / Hyperkit)  #46

Stage 3

* [ ] Linux (VirtualBox) #47
* [ ] Windows (VirtualBox) #48