Random Mob Sizes

• port to fabric
• add new command /mobScalings to set/remove/show the configured mob scalings
  • /mobScalings set <entity_type> <scaling> => set static scaling for the entity type
  • /mobScalings set <entity_type> <scaling_type> <min_scaling> <max_scaling> => set a specific scaling for the entity type
  • /mobScalings remove <entity_type> => remove the scaling for the entity type
  • /mobScalings show => show all configured mob scalings
  • /mobScalings show <entity_type> => show the scaling for the entity type

initial beta-release