Celebrities and rights groups called on Iran on Sunday to free the actor Taraneh Alidoosti, one of the most prominent figures yet arrested in its three-month crackdown on protests. Alidoosti, 38, was arrested on Saturday, official media said, after a string of social media posts supporting the protest movement including removing herheadscarf and condemning the execution of protesters. The unrest was sparked by the death in custody of Mahsa Amini, 22, whom the morality police accused of violating the Islamic republic’s strict dress code for women. Iran blames the United States and other “enemie…