Trim stack traces in REPL

[som-snytt]

Port the formatter from Scala 2, then use it in REPL exception handling.

(The formatter was ported in November and includes previous fix to how elided frames are counted.)

I didn't look into automated REPL output tests.

Starting scala3 REPL...
scala> ???
scala.NotImplementedError: an implementation is missing
  at scala.Predef$.$qmark$qmark$qmark(Predef.scala:345)
  ... 27 elided

scala> import scala.util.chaining._

scala> List(42).map(n => throw new IllegalArgumentException(n.toString).tap(_.addSuppressed(new RuntimeException("ouch"))))
java.lang.IllegalArgumentException: 42
  at rs$line$3$.$init$$$anonfun$2(rs$line$3:1)
  at rs$line$3$.$init$$$anonfun$adapted$1(rs$line$3:1)
  at scala.collection.immutable.List.map(List.scala:246)
  ... 27 elided
  Suppressed: java.lang.RuntimeException: ouch
    at rs$line$3$.$init$$$anonfun$1$$anonfun$1(rs$line$3:1)
    at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
    at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
    at scala.util.ChainingOps$.tap$extension(ChainingOps.scala:40)
    ... 30 more

scala> 

[som-snytt]

Rebased on #10723

[anatoliykmetyuk]

Otherwise LGTM