Add tasks for all the new languages

Task/Bitwise-operations/Sidef/bitwise-operations.sidef

@@ -0,0 +1,15 @@
+func bitwise(a, b) {
+
+   # Make sure they are integers
+   a.to_int!;
+   b.to_int!;
+
+   say ('a and b : ',  a & b);
+   say ('a or b  : ',  a | b);
+   say ('a xor b : ',  a ^ b);
+   say ('not a   : ',     ~a);
+   say ('a << b  : ', a << b);  # left shift
+   say ('a >> b  : ', a >> b);  # arithmetic right shift
+}
+
+bitwise(14,3)