Add American V8 preset, carb fuel transport, and adaptive desktop audio

include/FluidSim/Component.hpp

@@ -12,9 +12,11 @@ struct Port {
     float temperature{300.0f};
     float gamma_value{1.4f}, gas_constant_value{287.0f};
     float air_fraction{1.0f};
+    float fuel_fraction{};
     float* owner_energy{};
     float* owner_air_mass{};
     float* owner_exhaust_mass{};
+    float* owner_fuel_mass{};
 };
 
 // Small equivalent of the C# IComponent lifecycle. Components update their