Add tasks for all the new languages

Task/Playing-cards/Sidef/playing-cards.sidef

@@ -0,0 +1,31 @@
+define Pip = <A 2 3 4 5 6 7 8 9 10 J Q K>;
+define Suit = <♦ ♣ ♥ ♠>;
+
+class Card(pip, suit) {
+    method to_s { pip + suit }
+}
+
+class Deck(cards=[]) {
+
+    method init {
+        cards = gather {
+            Pip.each { |p| Suit.each { |s| take(Card(p, s)) } }
+        }
+    }
+
+    method shuffle {
+        cards.shuffle!;
+    }
+
+    method deal { cards.shift };
+    method to_s { cards.join(" ") };
+}
+
+var d = Deck();
+say "Deck: #{d}";
+
+var top = d.deal;
+say "Top card: #{top}";
+
+d.shuffle;
+say "Deck, shuffled: #{d}";