A shooter who allegedly wounded a police officer Monday at a Montclair home has been identified as a 39-year-old township woman, investigators announced Tuesday. Maryann Swain, of Montclair, who is still in the hospital after being shot by another officer, was charged with aggravated assault, endangering the welfare of a child and weapons-related offenses, according to a statement from the Essex County Prosecutor’s Office. Officers were called to a home on Forest Street shortly after 1 p.m. and were met with gunfire, the office said. “I heard three shots. Boom! Boom! Boom!,” Sean Ruff, 62, who…