Fully restore vmulti support

[pktiuk]

Currently support for vmulti input is only partial in Windows build it may be good to fully restore it.

About vmulti (from changelog)

Using that driver would allow antimicroX to use a virtual keyboard and mouse rather than
  using SendInput. That would allow antimicroX to work around UAC problems and
  anti-cheat programs.

It could be possible fix for games like Valorant https://github.com/AntiMicroX/antimicrox/issues/167 https://github.com/AntiMicroX/antimicrox/issues/406

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[pktiuk]

Probably linked with: https://github.com/AntiMicroX/antimicrox/issues/406

[pktiuk]

Comment from legacy issue https://github.com/AntiMicro/antimicro/issues/105

This one is my fault. I had been using a customized version of vmulti and I had been building antimicro using that VID+PID combination. Because of this, I was the only person who was ever able to use vmulti support. It is a great driver and it can be used to work around many problems that the SendInput implementation has; I had come across the driver while playing with Touchmote. Some of the benefits are being able to work with games that use HackShield or equivalent anti-cheat software without worrying about getting banned (seen as a real KB+M), working through UAC prompts, and not having to worry about running antimicro as the administrator for some games. Performance seems to be a little bit better as well but that could just be my perception. The main downside is that some multimedia keys are not mapped in the vanilla driver and that is why I was working on a custom version of vmulti.