By ROBERT PHILPOT Warehouse 13, a new show that launches Tuesday, should appeal to fans of Eureka, a summer fixture on the Sci-Fi Channel. Both shows are lighthearted comedy-dramas involving law-enforcement officials reluctantly taking an assignment at remote outposts where weird things happen. In Eureka’s case, it’s a town full of inventors whose inventions always seem to go haywire; in Warehouse 13, it’s a South Dakota storage facility that houses every weird artifact and supernatural souvenir ever collected by the U.S.