Add microbenching test harness

[Voltir]

Per the discussion we were having in issues - I thought about maybe doing something with testcontainers + rabbitmq to do a more realistic test, but did a survey of how some other libraries were doing it, and this seems like a pretty light weight and extensible approach.

I figure I could PR this very basic test, then if we want to extend it or focus more specifically on testing the mailbox we could talk about what kinds of microbenchmarks that would be useful, and then if this lands on main, ill update the other PR and take a look at how changing the queue implementation impacts those benchmarks.

Also:

[info] Result "com.suprnation.actor.ActorBench.ask":
[info]   18407.135 ±(99.9%) 1426.900 ops/s [Average]
[info]   (min, avg, max) = (13696.560, 18407.135, 21082.638), stdev = 1904.870
[info]   CI (99.9%): [16980.235, 19834.035] (assumes normal distribution)

[cloudmark]

Thank you for your contribution 🎉