[K/JS] Prepare JS Plain Objects plugin to publication

plugins/js-plain-objects/compiler-plugin/testData/diagnostics/wrongAnnotationTarget.kt

@@ -0,0 +1,28 @@
+// FIR_IDENTICAL
+// SKIP_TXT
+
+// FILE: test.kt
+import kotlinx.js.JsPlainObject
+
+<!NON_EXTERNAL_DECLARATIONS_NOT_SUPPORTED("class")!>@JsPlainObject
+class Regular1<!>
+
+@JsPlainObject
+<!NON_EXTERNAL_DECLARATIONS_NOT_SUPPORTED("object")!>object Regular2<!>
+
+<!NON_EXTERNAL_DECLARATIONS_NOT_SUPPORTED("enum class")!>@JsPlainObject
+enum class Regular3<!>
+
+<!ONLY_INTERFACES_ARE_SUPPORTED("class")!>@JsPlainObject
+external class External1<!>
+
+@JsPlainObject
+external <!ONLY_INTERFACES_ARE_SUPPORTED("object")!>object External2<!>
+
+@JsPlainObject
+external interface External3
+
+external class Nested {
+    @JsPlainObject
+    interface Inner
+}