[nop] [#176] make deps on compression libs optional

[scarytom]

Use reflective calls to interact with org.tukaani/xz and io.airlift/aircompressor so that users of nippy can choose to exclude those dependencies if they aren't using compression.

Reflective calls are much slower, and some type-hints were also removed, so these changes might affect performance.

[ptaoussanis]

@scarytom Hi Tom, thanks for looking into this 🙏

Unfortunately I'm definitely not keen on anything that'd impact performance for typical users. Haven't given this detailed thought since I'm currently focused on other priorities, but in case it's helpful - some other ideas to consider would be:

• Conditionally requiring namespaces that implement specific compressors example
• Conditionally compiling relevant code example
• Potentially caching any reflection, if reflection is really necessary (don't have an example handy, sorry).