re-hook up file association so WJ can load modlists from double clicking .wabbajack file, and enable URL protocol for loading a modlist

[JanuarySnow]

a lot of the logic was already there, and this was implemented previously :

https://github.com/wabbajack-tools/wabbajack/pulls?q=is%3Apr+is%3Aclosed+file+association

it had issues like opening WJ in in system32 etc

ive mitigated that with forcing Windows to get current exe location to start in, and some robust handling incase it wants to start in System32 anyway

launch wj once for it to "heal" the current exe location and shove that into the windows registry for current user

tested and it runs any .wabbajack file by double clicking it, goes straight to install page as if you had selected "load modlist from file"

and I double checked wabbajack.exe location and where its running from and its not anywhere near system32

Also added handling for launching WJ via a special url protocol , format is wabbajack:/// so basically the machineurl for publishing, this will launch straight into the gallery, display a loading spinner while the wabbajack file is downloaded, and then launch into the install config

caveats:

WJ must be loaded at least once before hand, before file association or URL handling will work, as launching WJ will register those things

url handling only will deal with lists on the gallery ( for now ) with a machineurl

I want to add capability to embed a download url in the wabbajack:// url so it can prompt an external download of a WJ file