More granularity in interrupt handlers configuration

[kevinferrare]

Currently we have one flag Configuration.InitializeDOS that enables or disables all custom interrupt handlers.
This is not going to work if we want to load another operating system but keep the emulated bios for example.
Suggestion by @maximilien-noal :

This could be an option group:
https://github.com/commandlineparser/commandline/wiki/Verbs

for example:
Spice86 --initialize bios dos