gum: add meta.mainProgram

+1
+1
pkgs/applications/misc/gum/default.nix
··· 34 changelog = "https://github.com/charmbracelet/gum/releases/tag/v${version}"; 35 license = licenses.mit; 36 maintainers = with maintainers; [ maaslalani ]; 37 }; 38 }
··· 34 changelog = "https://github.com/charmbracelet/gum/releases/tag/v${version}"; 35 license = licenses.mit; 36 maintainers = with maintainers; [ maaslalani ]; 37 + mainProgram = "gum"; 38 }; 39 }