hasNametagBone
Whether this model is capable of rendering a nametag at all.
FMM also supplies a nameplate above the hitbox when no authored anchor exists. Other providers may still require a nametag bone. This capability check keeps missing-name warnings limited to providers which cannot render a fallback.
Return
false only when it is known that no nametag can ever render; true when a nametag anchor exists or when the model plugin cannot report the capability.