Mosa.Utility.Launcher: bug fixes and behavioral changes

[AnErrupTion]

Hi! This PR focuses on bug fixes and general behavioral changes around Mosa.Utility.Launcher, alongside a few minor features. Here's what been changed:

• On Linux, the GUI launcher is used in the script files in the Demos folder instead of the console launcher
• Added a Demos/Console directory which contains scripts that use the console launcher instead of the GUI one
• In Mosa.Utility.Configuration:
  • Added new app locations for Bochs' BIOS and VGA BIOS. This is because, on Linux, the launch code would try to get the files under /bin, which is simply incorrect
  • The setting Emulator.SVGA has been renamed to Emulator.Graphics
  • Added a new setting Emulator.Acceleration, which currently enables hardware acceleration (WHPX on Windows, HVF on macOS, and KVM on Linux) for QEMU
• In Mosa.Utility.Launcher:
  • Removed the BaseLauncher.Quote() method. Instead, string interpolation is used at all times and when instead a StringBuilder is present, strings are appended directly to it instead of concatenation to decrease any potential memory allocations
  • Removed the BaseLauncher.NullOrEmpty() method because it was only used once, and it was trivial to implement anyway
  • The BaseLauncher.GetResource(string) method now throws if a manifest resource isn't found
  • In the Builder.Build() method, the Stopwatch.Start() method is called instead of Stopwatch.StartNew() because else it wouldn't start the instantiated Stopwatch, but instead it'd create a new one and discard it immediately
  • The Builder.Build() method no longer checks if MosaSettings.TemporaryFolder and MosaSettings.ImageFolder exist before creating them, because Directory.CreateDirectory() already does that. Furthermore, it'll create any subdirectories, removing the need for creating MosaSettings.TemporaryFolder
  • In the SimpleTCP class, incrementations and decrementations of the volatile lines field have been replaced with Interlocked.Increment() and Interlocked.Decrement() respectively
  • The Starter.IsSucccessful property has been renamed to Starter.IsSuccessful
  • In the Starter class, the lockObject field has been introduced to avoid locking using this

[charsleysa]

@AnErrupTion please update branch with latest master