STAMFORD — Kind, generous, supportive and hard-working. These are the words Kristi Larson, head of the English Language Learner program at Stamford High School, used to describe 18-year-old Erwin Hernandez, a senior who was seriously injured last week when a car crashed into the restaurant where he worked. Hernandez was working in the kitchen at Table 104, a restaurant on Long Ridge Road, when a vehicle crashed through the kitchen wall on Wednesday, causing serious damage to his right leg.