Create: Walkers

Adds the ability to create mobile contraptions with create,

Project todo:

• change the contraption group id, currently stuck on creates one, VERY IMPORTANT BEFORE ANY RELEASE
• remove unused components of vehicle implementation
• remove testing client vehicle once contraption vehicles are finished
• change vehicle update leg animation data packet to bytes instead of compound tag to reduce network usage
• clipping hitboxes instead of rays
• smarter step targets to allow for going over gaps or obstacles
• make code less bad please

Controls Notes:

• Clone controlsHandler, packet should be interchangeable
• (Extension of controls util)
• Make stuff for controlling in the entity

Planned:

• different leg types