Add scripted scala3-sandwich

sbt/src/sbt-test/project/scala3-sandwich/bar-app/D.scala

@@ -0,0 +1,5 @@
+package example
+
+object D {
+  val x = C.x
+}

sbt/src/sbt-test/project/scala3-sandwich/bar-core/C.scala

@@ -0,0 +1,5 @@
+package example
+
+object C {
+  val x = 1
+}

sbt/src/sbt-test/project/scala3-sandwich/build.sbt

@@ -0,0 +1,23 @@
+ThisBuild / scalaVersion := "3.0.0-M1"
+
+lazy val scala213 = "2.13.4"
+
+lazy val root = (project in file("."))
+  .aggregate(fooApp, fooCore, barApp, barCore)
+
+lazy val fooApp = (project in file("foo-app"))
+  .dependsOn(fooCore)
+
+lazy val fooCore = (project in file("foo-core"))
+  .settings(
+    scalaVersion := scala213,
+  )
+
+lazy val barApp = (project in file("bar-app"))
+  .dependsOn(barCore)
+  .settings(
+    scalaVersion := scala213,
+    scalacOptions += "-Ytasty-reader"
+  )
+
+lazy val barCore = (project in file("bar-core"))

sbt/src/sbt-test/project/scala3-sandwich/foo-app/B.scala

@@ -0,0 +1,5 @@
+package example
+
+object B {
+  val x = A.x
+}

sbt/src/sbt-test/project/scala3-sandwich/foo-core/A.scala

@@ -0,0 +1,5 @@
+package example
+
+object A {
+  val x = 1
+}

sbt/src/sbt-test/project/scala3-sandwich/test

@@ -0,0 +1,3 @@
+> fooApp/compile
+
+> barApp/compile