[2.0.72] ItemPrototype:additional_fuel_categories

[thesixthroc]

This API would mirror RecipePrototype:additional_categories (or any replacement for this API in 2.1).

The heating entity in the Cerys mod consumes only solid fuel. For this to work, solid fuel is changed to a new fuel_category "chemical-or-radiative", and that FuelCategoryID is then added to the fuel_categories of many different BurnerEnergySource.

If another mod similarly wants to give special behavior to solid fuel, the only way to implement is to use more cascading `-or-`s, e.g. `chemical-or-radiative-or-solid`, causing ‘incompatibility by default’ similar to recipe categories earlier in 2.0.