Feature request: Rotate 3D pickups

[aredfan]

When LostArtefacts/TRX#1634 is implemented, it'll be worth doing a playthrough of TR2/GM to identify pickups that'll need rotating - in particular plot items like keys, masks, seraph etc. We can use trview waypoints to mark these pickups.

Example:

Once the waypoint(s) is created for a particular level, make sure to export the route file using the level's name. Once all levels are done - the next step is to upload all route files on here as a zip file.