Migrate to ZIO 2.0.0 final

[reibitto]

I started the migration to ZIO 2.0.0 final but I ran into many roadblocks so this is still in an incomplete state. The compile errors regarding macros are beyond my ability.

@vigoo @adamgfraser Whether you want to use this as a base or throw it away, either is fine with me. Just thought I'd publish what I have so far regardless.

[vigoo]

Thanks for starting it!

[vigoo]

@reibitto I fixed the unsafes, there are still some failing tests and compilation error on Scala Native, feel free to continue as I don't have more time right now for this

[reibitto]

I pushed an update that should fix a bunch of the failing tests. JVM modules seem fine to me locally now. I don't know about scala-native though. Still can't get that to compile.

[reibitto]

Oh wait, JVM and native is good now in CI. JS is the one that has an issue. Looks like SecureRandom isn't available on Scala.js by default?

[reibitto]

ok, adding "org.scala-js" %%% "scalajs-java-securerandom" % "1.0.0" fixed that last error. That same dependency is in the main zio project so I assume it's fine?

Everything is green now. Might want to make sure my change in MockClock to support the currentTime overload is correct. I wasn't too sure about that. I followed one of the examples in the tests.

[vigoo]

Looks good to me, I'm merging and releasing it. Thank you!