Make the project zio.cli.sbt/sbt-zio-cli publishable by default (#209)

* Make the project `zio.cli.sbt/sbt-zio-cli` publishable by default

Currently, `zio.cli.sbt/sbt-zio-cli` is not published in maven.

* Fix CI build

Upgrade dotty to 3.3.0 to match other zio packages.

Use `++version` instead of `++verison!` in the CI,
because the latter syntax forces a Scala version for all
subprojects ignoring the compatible versions declared in crossScalaVersions.

For example; `++3.3.0!` would force the sbt plugin to compile with
Scala version 3.3.0, while ++3.3.0 would recognize that the project
is incompatible with dotty and skip it.

It is crucial to only build the sbt plugin with Scala version 2.12,
which is what sbt 1 itself is built with.

* Automatic formatting with `sbt fmt`

To make the CI happy.