Add tasks for all the new languages

Task/The-ISAAC-Cipher/Sidef/the-isaac-cipher.sidef

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+require('Math::Random::ISAAC');
+
+func xor_isaac(key, msg) {
+  var rng = %s<Math::Random::ISAAC>.new(unpack('C*', key));
+
+  msg.chars»ord»()                                             \
+    -> »^« 256.of{ rng.irand % 95 + 32 }.last(msg.len).reverse \
+    -> «%« '%02X' -> join;
+}
+
+var msg = 'a Top Secret secret';
+var key = 'this is my secret key';
+
+var enc = xor_isaac(key, msg);
+var dec = xor_isaac(key, pack('H*', enc));
+
+say "Message: #{msg}";
+say "Key    : #{key}";
+say "XOR    : #{enc}";
+say "XOR dcr: #{pack('H*', dec)}";