[Core] Butchery - Framework

[LambdaSix]

Implement Butchery as a data driven framework.

• Define butchery steps in JSON with skill/difficulty multipliers for later in-game tweaking*
  So that time for a step is driven by the factors and the creatures Mass/Volume and
  the quality of tool being used.
• 'ToolFactor' defines the bonus to output from higher quality tools
  Better tools should slightly reduce time taken but also increase outputs.
• Define butchery steps by which product types they produce
• Allow special results, i.e, field dress should extend the carcass's lifetime
• Definition of Requirements (rope, flat surface) for steps
• Allow steps to define bonuses/penalties for having performed prior steps
  So that Quartering first reduces the value of Skinning later.
  This could be implemented via temporary flags.
• Each step should be an Activity so that it can paused & resumed later without issue.

Current data is designed skinning around a Moose taking around 2 hours for an experienced (Level 10) hunter.

[*] - Global difficulty modifiers can just increase/decrease the factors