Remove the automatic dependency on zio

We need to remove the management of the ZIO dependency(ies) and version from this plugin. zio-logging recently (v2.3.0) updated zio-sbt to the latest alpha version. This implicitly updated the ZIO version to `v2.1.1`, which isn't bin-compatible with `v2.0.x` We had a bug a work because of that. Dependencies version management must be explicit actions from the author of the libraries so that it's easier for the user of these lib to see/track when a dependency of these libs is updated. I was quick to find the issue because I help on zio-sbt and I know quite well the ZIO env but I can't imagine how difficult it could be to find the issue when for more beginners