WASD character movement using AddMovementInput with input axis events

Pattern: InputAxis MoveForward → Multiply_FloatFloat(A=AxisValue, B=1.0) → AddMovementInput(WorldDirection=GetActorForwardVector, ScaleValue=Product). Repeat for MoveRight with GetActorRightVector. Key pins: AddMovementInput inputs: 'WorldDirection' (Vector) and 'ScaleValue' (float). Input Axis event output pin is named 'Axis Value' (float).