New Feature for Player Movement: Stick to Walls and Slopes / Anti Surf / Local Gravity

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General idea here is to have a tick box that enables you to stand, walk or run on steep slopes and walls without going into a surfing/falling state, kind of like the old Gravity Hull addon, with maps in mind though.

This could lead to some interesting mechanics that wasn't possible before without being put into a surfing/falling state, such as wall jumping, parkour/wall climbing, gravity switching, being able to run up and down steep ramps much like vehicles can or going around loops à la Sonic.