Method enqueue

src/system/buffer.rs:44–52

(&mut self, item: T)

impl<const SIZE: usize, T: Copy> Queue<T> for Buffer<SIZE, T> {
    fn enqueue(&mut self, item: T) {
        if self.tail == SIZE - 1 {
            // Discard the data. we are buffer oerflow.
            return;
        }

        self.data[self.tail] = item;
        self.tail += 1;
    }

    fn dequeue(&mut self) -> Option<T> {
        if self.tail == 0 {