Split mill.scalalib out of mill.javalib (#5470)

Final follow up from #3567,
breaking `libs.javalib` and `libs.scalalib` into two separate modules,
with `scalalib` depending on `javalib` but not vice versa.

Most files application code files were already split into two packages,
though the tests were previously mostly in `scalalib` and were mostly
moved unchanged with just package/import renamings. A few were split
into two separate files to avoid circular dependencies between the two
modules, e.g. Java and Scala versions of `GenIdeaModule.scala`, or Java
and Scala versions of `JavaHomeTests`

Author: lihaoyi

.scalafmt.conf

@@ -32,8 +32,8 @@ project {
     "glob:**/javalib/test/resources/javalib/palantirformat/**",
     "glob:**/integration/failure/parse-error/**",
     "glob:**/testkit/test/resources/example-test-example-project/build.mill",
-    "glob:**/javalib/test/resources/scalafmt/**",
-    "glob:**/javalib/test/resources/spotless/**"
+    "glob:**/scalalib/test/resources/scalafmt/**",
+    "glob:**/scalalib/test/resources/spotless/**"
   ]
 }
 

contrib/artifactory/src/mill/contrib/artifactory/ArtifactoryPublishModule.scala

@@ -2,7 +2,7 @@ package mill.contrib.artifactory
 
 import mill._
 import mill.api.Result
-import scalalib._
+import javalib._
 import mill.contrib.artifactory.ArtifactoryPublishModule.checkArtifactoryCreds
 import mill.api.{ExternalModule, Task}
 

contrib/artifactory/src/mill/contrib/artifactory/ArtifactoryPublisher.scala

@@ -1,7 +1,7 @@
 package mill.contrib.artifactory
 
 import mill.api.Logger
-import mill.scalalib.publish.Artifact
+import mill.javalib.publish.Artifact
 
 class ArtifactoryPublisher(
     releaseUri: String,

contrib/codeartifact/src/mill/contrib/codeartifact/CodeArtifactPublisher.scala

@@ -4,7 +4,7 @@ import java.time.{Instant, ZoneId}
 import java.time.format.DateTimeFormatter
 
 import mill.api.Logger
-import mill.scalalib.publish.Artifact
+import mill.javalib.publish.Artifact
 
 class CodeartifactPublisher(
     releaseUri: String,

contrib/codeartifact/src/mill/contrib/codeartifact/CodeartifactPublishModule.scala

@@ -1,7 +1,7 @@
 package mill.contrib.codeartifact
 
 import mill._
-import scalalib._
+import javalib._
 import mill.api.ExternalModule
 
 trait CodeartifactPublishModule extends PublishModule {

contrib/docker/src/mill/contrib/docker/DockerModule.scala

@@ -1,7 +1,7 @@
 package mill
 package contrib.docker
 
-import mill.scalalib.JavaModule
+import mill.javalib.JavaModule
 import os.Shellable.IterableShellable
 
 import scala.collection.immutable._

contrib/docker/test/src/mill/contrib/docker/DockerModuleTest.scala

@@ -1,7 +1,7 @@
 package mill
 package contrib.docker
 
-import mill.scalalib.JavaModule
+import mill.javalib.JavaModule
 import mill.api.ExecResult
 import mill.api.Discover
 import mill.testkit.UnitTester

contrib/flyway/src/mill/contrib/flyway/FlywayModule.scala

@@ -10,7 +10,7 @@ import scala.jdk.CollectionConverters._
 
 import mill.*
 import mill.api.PathRef
-import mill.scalalib.{Dep, JavaModule}
+import mill.javalib.{Dep, JavaModule}
 import org.flywaydb.core.api.output.{BaselineResult, CleanResult, MigrateOutput, MigrateResult}
 
 trait FlywayModule extends JavaModule {

contrib/flyway/test/src/mill/contrib/flyway/BuildTest.scala

@@ -2,7 +2,7 @@ package mill.contrib.flyway
 
 import mill.*
 import mill.api.Discover
-import mill.scalalib.*
+import mill.javalib.*
 import mill.testkit.UnitTester
 import mill.testkit.TestRootModule
 import utest.{TestSuite, Tests, assert, *}

contrib/gitlab/src/mill/contrib/gitlab/GitlabPackageRepository.scala

@@ -1,6 +1,6 @@
 package mill.contrib.gitlab
 
-import mill.scalalib.publish.Artifact
+import mill.javalib.publish.Artifact
 
 sealed trait GitlabPackageRepository {
   def url(): String