Unmount/Re-mount Vpk After Map Compile (#1309)
* Initial commit
* Test mount/unmount VPK methods
* Remove file extension when passing to Mount/UnmountVPK
* Use ChangeExtension instead as apparently this preserves the path...
* Fix IsVPKMounted check not working
* Fix docs
* Use correct log channel
* Rename to OnPreCompileFinished + OnPostCompileFinished