SNELLVILLE — City Councilman Melvin Everson is seeking a state House of Representatives seat in 2004. If he wins, Everson will be the first black Republican in state government, a milestone former U.S. Rep. J.C. Watts of Oklahoma achieved in Congress in 1994. Current mayor pro tem of Snellville, Everson, 45, announced his candidacy Monday for District 70, post 1. The seat is currently held by Charles Bannister, the former Lilburn mayor who is mulling over a race for Gwinnett Commission Chairman. “I’m running for the Legislature because it’s time for a change at the state Capitol. Too many major...