[JS IR] Add test with boolean in external interface

[JS IR] Add possibility to safely access Boolean in external declaration

[JS IR] Add diagnostic for booleans in externals

libraries/stdlib/js-ir/runtime/booleanInExternalHelpers.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.js
+
+import JsError
+
+@JsName("Boolean")
+internal external fun nativeBoolean(obj: Any?): Boolean
+
+internal fun booleanInExternalLog(obj: dynamic) {
+    if (jsTypeOf(obj) != "boolean") {
+        console.asDynamic().error("Boolean expected, but actual:", obj)
+    }
+}
+
+internal fun booleanInExternalException(obj: dynamic) {
+    if (jsTypeOf(obj) != "boolean") {
+        throw JsError("Boolean expected, but actual: $obj")
+    }
+}