Properly handle REPL snippets with exceptions ...

so the REPL remain operational after exception in one of the snippets:
- separately return script class and script instance on evaluation (
  because in case of an exception the class is valid, while the instance
  is not).
- store both the class and the instance in the history
- handle this data accordingly

libraries/scripting/jsr223-test/test/kotlin/script/experimental/jsr223/test/KotlinJsr223ScriptEngineIT.kt

@@ -85,6 +85,23 @@ class KotlinJsr223ScriptEngineIT {
         Assert.assertEquals(5, res3)
     }
 
+    @Test
+    fun testEvalWithException() {
+        val engine = ScriptEngineManager().getEngineByExtension("kts")!!
+        try {
+            engine.eval("throw Exception(\"!!\")")
+            Assert.fail("Expecting exception to propagate")
+        } catch (e: ScriptException) {
+            Assert.assertEquals("!!", e.cause?.message)
+        }
+        // engine should remain operational
+        val res1 = engine.eval("val x = 3")
+        Assert.assertNull(res1)
+        val res2 = engine.eval("x + 4")
+        Assert.assertEquals(7, res2)
+    }
+
+
     @Test
     fun testEngineRepeatWithReset() {
         val code = "open class A {}\n" +