refactor: dont enumerate the cached list

tui_list.go

···
 }
 
 func (d itemDelegate) Render(w io.Writer, m list.Model, index int, listItem list.Item) {
+	// todo: print rfc title along with it's number
+
 	i, ok := listItem.(item)
 	if !ok {
 		return
 	}
-
-	str := fmt.Sprintf("%d. %s", index+1, i)
 
 	fn := itemStyle.Render
 	if index == m.Index() {
···
 		}
 	}
 
-	fmt.Fprint(w, fn(str))
+	fmt.Fprint(w, fn(string(i)))
 }