Add tasks for all the new languages

Task/Balanced-brackets/EchoLisp/balanced-brackets.echolisp

@@ -0,0 +1,28 @@
+(define (balance str)
+	(for/fold (closed 0) ((par str))
+	 #:break (< closed 0 ) => closed
+	(+ closed
+	(cond
+		((string=? par "[")  1)
+		((string=? par "]") -1)
+		(else 0)))))
+		
+(define (task N)
+(define str (list->string (append (make-list N "[") (make-list N "]"))))
+	(for ((i 10))
+	(set! str (list->string (shuffle (string->list str))))
+	(writeln  (if (zero? (balance str)) '👍  '❌ ) str)))
+
+(task 4)
+
+❌     "[]]][[]["
+❌     "]][][[[]"
+❌     "][[[]]]["
+👍     "[][[[]]]"
+❌     "]][[][]["
+❌     "][][[[]]"
+👍     "[][][[]]"
+❌     "]][[][[]"
+❌     "[[]]][[]"
+❌     "[[][]]]["
+