A proposed solar project in Orrington would generate almost all of the electricity needed for the town’s school, and the town says taxpayers won’t have to foot the bill. Plans for a solar array to be built next to Center Drive School, one of three schools in AOS 47, the school district serving Airline, Dedham and Orrington, were revealed in a Thursday meeting. The solar array would be made of just four rows of panels but would eventually generat…