A who’s who of South Asian artists, writers, journalists, filmmakers and intellectuals will soon arrive in the Bay Area for a weekend of conversations, art and poetry. The South Asian Literature and Art Festival gets underway at Stanford University Sept. 28-29 with a theme of “Plurality in Community.” That means the festival won’t shy away from complex topics such as caste, class, gender and borders “to understand,” as the event proclaims, “how individuality and collectivity can coexist and collide.”