Consecutive Ankle Sprain Classification and Injury Systematization (Cascais), A New Lateral Ankle Sprain Classification Based on the Pivot Test: A Prospective Cohort Study [Consecutive Ankle Sprain Classification and Injury Systematization (Cascais), Uma Nova Classificação de Entorse Lateral do Tornozelo Baseada No Teste de Pivot: Estudo Prospetivo de Coorte]