Queue
- ✓ Add one element to queue
- ✓ Add many element to queue
- ✓ Remove element from queue with one element
- ✓ Remove last element from queue with two element
- ✓ Remove first element from queue with two element
- ✓ Remove middle element from queue with three element
- ✓ Remove element from queue invalid parameters
- ✓ Get element from queue as array
- ✓ Return queue as string
- ✓ Return queue as array
- ✓ Count queue elements