Add tactical ladder

[Kexanone]

When merged this pull request will:

• Closes Add tactical ladder #68

out9.mp4

Background:

• While you can set bones as reference for the start and end of a ladders, animating said bones will break the ladder. We use multiple ladder components with fixed start and end points instead and select the correct component depending on how far the ladder is extended. Players that are on the ladder while someone else is extending or retracting it, will be dropped from the ladder, as there doesn't seem to be a way to move them from one ladder component to another.
• The ladder is currently using the mine IK pose and animations when a player puts it in their hand.