Add tasks for all the new languages

Task/Bitwise-operations/Nim/bitwise-operations.nim

@@ -0,0 +1,7 @@
+proc bitwise(a, b) =
+  echo "a and b: " , a and b
+  echo "a or b: ", a or b
+  echo "a xor b: ", a xor b
+  echo "not a: ", not a
+  echo "a << b: ", a shl b
+  echo "a >> b: ", a shr b