Add tasks for all the new languages

Task/Catalan-numbers/Sidef/catalan-numbers-1.sidef

@@ -0,0 +1,2 @@
+func f(i) { i==0 ? 1 : (i * f(i-1)) }
+func c(n) { f(2*n) / f(n) / f(n+1) }

Task/Catalan-numbers/Sidef/catalan-numbers-2.sidef

@@ -0,0 +1,3 @@
+func c(n) is cached {
+    n == 0 ? 1 : (c(n-1) * (4 * n - 2) / (n + 1));
+}

Task/Catalan-numbers/Sidef/catalan-numbers-3.sidef

@@ -0,0 +1,3 @@
+15.times { |i|
+    say "#{i-1}\t#{c(i-1)}";
+}