Reduce data copying

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

Currently, there is a lot of time spent copying payload data.

Especially onerous is an entire copy made just to generate a crc32c of the payload.

Using the pack() / flush() API should be be more efficient.

Also, ByteBufferOutputStream copies incoming ByteBuffer contents to "pack" the data. Instead, the incoming ByteBuffers can be appended as-is.


### Expected Behavior

_No response_

### Steps To Reproduce

put a high volume of messages into a queue while using Java Flight Recorder to profile the method execution times.

### BlazingMQ Java SDK Version

0.0.9

### Anything else?

_No response_