feat: handle binary buffers with messageBuffer

[Julien-R44]

The issue is well described here: Julien-R44/bentocache#19

Basically: when using a custom encoder which returns a buffer with binary data, then it will not work. because the message event emitted by ioredis automatically converts buffers

When dealing with binary data then ioredis recommends using the messageBuffer event: https://github.com/redis/ioredis?tab=readme-ov-file#pubsub

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Suggested solution: when we create our bus with the redis transport, we can now pass the useMessageBuffer option which will make the bus listen on the messageBuffer event rather than message.

const manager = new BusManager({
  transports: {
    redis: {
      transport: redis(
        {
          useMessageBuffer: true, // here
          host: 'localhost',
          port: 6379,
        },
        new BinaryEncoder() // pass our custom encoder
      ),
    },
  },
})

Breaking Change: The encoder signature has changed. The decode function now accepts a string or a Buffer. I think we can release that this in a minor release, since i think nobody has created a custom encoder yet.