feat(spec): better file path suggestions (#41)

Enhance file/folder suggestion

commands/view/nvim.go

@@ -8,6 +8,7 @@ func init() {
 	spec.Register(&spec.Spec{
 		Name:        "nvim",
 		Description: "Hyperextensible Vim-based text editor",
+		Generator:   spec.FileGenerator(),
 		Options: []spec.Option{
 			{Name: "--cmd", Description: "Execute <cmd> before any config"},
 			{Name: "-c", Description: "Execute <cmd> after config and first file"},