HARGEISA, Somalia — The Kulan Art Café is a bright airy place with murals and framed paintings by local artists on the wall, potted plants, fresh coffee and ice cream, homemade cakes and a menu featuring Western staples like pizza and hamburgers. In Hargeisa, the capital of the breakaway state of Somaliland, there is nothing else like it. Nor for that matter is there anything like it anywhere else in Somalia, a place which, as it gradually emerges from decades of conflict is attracting increasing numbers of diaspora Somalis home.