Reintroduce actors

[0bon]

In regards to the licensing fiasco with Akka and lightbend, it would be great to bring scala actors back from the dead as an alternative to the akka eco-system. Please discuss.

[som-snytt]

Merits a discussion! https://github.com/lampepfl/dotty/discussions

If they are provided by pekko, are actors called pectors?