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.

[waruqi]

Does it ready now?

[A2va]

There are a few things missing (unit tests, ...), I will test again tomorrow and the review can be done this weekend.
If anyone wants to try and provide feedback, I will be happy to take it.

[waruqi]

you can add this new format in test.

xmake/tests/plugins/pack/xmake.lua

Line 22 in c31fa8f

set_formats("nsis", "srpm", "rpm", "zip", "targz", "srczip", "srctargz", "runself")

it will be tested on ci.