Migrate from NAN -> NAPI

[cowboyd]

What

N-API is a forward ABI compatible API that is supported by Node, Deno, and Bun. By using N-API instead of NAN, @confluent/kafka-javascript will be able to run on all those runtimes as well as any other runtime that comes along that supports N-API.

Checklist

• [ ] Contains customer facing changes? Including API/behavior changes
• [ ] Did you add sufficient unit test and/or integration test coverage for this PR?
  • If not, please explain why it is not required

References

JIRA:

Test & Review

Open questions / Follow-ups