export cats effect MBean stats by setting sys prop or dropping a dependency

[swapdonkey]

Maybe I should of posted this on #575 but it would be good if otel4s integrated with cats effect MBeans/metrics and could publish the cats effect stats that are available in the following MBeans

https://github.com/typelevel/cats-effect/blob/series/3.x/core/jvm/src/main/scala/cats/effect/metrics/CpuStarvationMbean.scala
https://github.com/typelevel/cats-effect/blob/series/3.x/core/jvm/src/main/scala/cats/effect/unsafe/metrics/ComputePoolSamplerMBean.scala
https://github.com/typelevel/cats-effect/blob/series/3.x/core/jvm/src/main/scala/cats/effect/unsafe/metrics/LocalQueueSamplerMBean.scala

At the moment we're having to use https://github.com/open-telemetry/opentelemetry-java-contrib/blob/main/jmx-metrics/README.md to gather the cats effect metrics and publish to a local otel collector which isn't the best solution.
It would be a good incentive for cats effect users to use otel4s too.

[swapdonkey]

I see theres already a PR from quite a while back for a draft implementation - #173

[iRevive]

Hey! The #173 relies on the non-released functionality in cats-effect. And I'm unsure whether it would be merged at all in the foreseen future.

I guess we can provide cats-effect metrics reading MBean data.

[iRevive]

Here is a draft implementation: typelevel/otel4s-experimental#2.

The plan is the following:

1. Release this functionality in the experimental package: otel4s-experimental-metrics
2. Iterate over improvements/changes
3. Promote to the otel4s repository

[swapdonkey]

Awesome looks good to me.