[FR] Automated environment installer

[pyr0ball]

Is your feature request related to a problem? Please describe.
Currently every contributor / user has to set up their own build environment if they want to modify the firmware. This is not easy for many people.

Describe the solution you'd like
A script, either interactive or entirely automated, would go a long way in synchronizing these environments

Describe alternatives you've considered
a setup guide might also work

Additional context
On Windows, this will require either bundling a wget binary, utilizing powershell, and handing the actual install script off to a posix-like environment like MingW64, or some combination of those