add plain render function

src/clj_figlet/core.clj

@@ -112,4 +112,9 @@
       (fn [out c]
         (render-char c flf out))
       output
-      s)))
+      s)))
+
+(defn render [^String s flf]
+  (->> (str/split s #"\n")
+       (map #(render-line % flf))
+       (apply concat)))