Initialize the input information, which basically describes what the inputs to the neural network are going to be. This contains things such as bone and curve names. The input info is used during both training and inference time. It is used to see what bone transforms and curve values to feed into the network inputs. Next to bones and curve reference it also stores the vertex counts of the base and target meshes, so we can later do some compatibility checks when applying this ML Deformer onto some character.