Add InitToken and InitPin functionality

[microshine]

graphene-pk11 allows initializing the token and set the User PIN. We should add the same functionality to the node-webcrypto-p11 and Fortify

PeculiarVentures/graphene#150 (comment)

I'm not sure about InitToken, but InitPin would be useful.

if (!crypto.isPinInitialized()) {
  crypto.initPin(pin);
}