Xpack: wix toolset support

[A2va]

Closes #4637

TODO:

• Add to PATH
• Add xpack components
• Submit package to xmake-repo

There are two drawbacks:

• From what I have learned with the wix toolset, you cannot set the order of the actions (installing files, creating folders). So the commands set in before_installcmd or after_installcmd can be executed at the same time.
• The actions that wix can perform are limited, so the move and cd commands are not supported.