Launcher mode and auto-stop behaviour

[Aemony]

SKIF's launcher mode SKIF %COMMAND% does not provide a way to control the auto-stop behavior atm, nor uses the global registry value either.

Solution would be to either:

• Use the global value.
• Add support for a new command-line argument that controls the behavior.

[Aemony]

Another option was thought of as well:

• Registry based flags based on the install folder, allowing SKIF Launcher to quickly read any appropriate settings without having to parse the full JSON file.

This method would be able to hold like 32 flags in a single DWORD value indicating various states that controlled blacklist/whitelist, auto-stop behavior, elevate state, etc.