Add tasks for all the new languages

Task/Floyds-triangle/Sidef/floyds-triangle.sidef

@@ -0,0 +1,10 @@
+func floyd(rows, n=1) {
+    var max = Math.range_sum(1, rows);
+    var widths = (max-rows .. max-1 -> map{(.+n).to_s.len});
+    { |r|
+        say %'#{1..r -> map{|i| "%#{widths[i-1]}d" % n++}.join(" ")}';
+    } * rows;
+}
+
+floyd(5);     # or: floyd(5, 88);
+floyd(14);    # or: floyd(14, 900);