Prefer immutable collections

Proprietary

Replaces imports of scala.collection.mutable.* with scala.collection.immutable.*. Idiomatic Scala prefers immutable collections.

org.openrewrite.scala.cleanup.PreferImmutableCollections

mod run . --recipe=org.openrewrite.scala.cleanup.PreferImmutableCollections

Install it once from Recipe actions, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.