[FIR JS] Implement FirJsExportDeclarationChecker

compiler/testData/diagnostics/testsWithJsStdLib/export/wrongExportedDeclaration.fir.kt

@@ -4,18 +4,18 @@
 
 package foo
 
-@JsExport
-inline fun <reified T> inlineReifiedFun(x: Any) = x is T
+<!WRONG_EXPORTED_DECLARATION("inline function with reified type parameters")!>@JsExport
+inline fun <reified T> inlineReifiedFun(x: Any)<!> = x is T
 
-@JsExport
-suspend fun suspendFun() { }
+<!WRONG_EXPORTED_DECLARATION("suspend function")!>@JsExport
+suspend fun suspendFun()<!> { }
 
-@JsExport
-val String.extensionProperty
+<!WRONG_EXPORTED_DECLARATION("extension property")!>@JsExport
+val String.extensionProperty<!>
     get() = this.length
 
 @JsExport
-annotation class AnnotationClass
+annotation class <!WRONG_EXPORTED_DECLARATION("annotation class")!>AnnotationClass<!>
 
 @JsExport
 interface SomeInterface
@@ -25,24 +25,24 @@ external interface GoodInterface
 
 @JsExport
 interface InterfaceWithCompanion {
-    companion object {
+    companion <!WRONG_EXPORTED_DECLARATION("companion object inside exported interface")!>object<!> {
         fun foo() = 42
     }
 }
 
 @JsExport
 interface OuterInterface {
-    class Nested
+    class <!WRONG_EXPORTED_DECLARATION("nested class inside exported interface")!>Nested<!>
 }
 
 @JsExport
-value class A(val a: Int)
+value class <!WRONG_EXPORTED_DECLARATION("value class")!>A(val a: Int)<!>
 
 @JsExport
-inline class B(val b: Int)
+inline class <!WRONG_EXPORTED_DECLARATION("value class")!>B(val b: Int)<!>
 
 @JsExport
-inline value class C(val c: Int)
+inline value class <!WRONG_EXPORTED_DECLARATION("value class")!>C(val c: Int)<!>
 
 @JsExport
-value inline class D(val d: Int)
+value inline class <!WRONG_EXPORTED_DECLARATION("value class")!>D(val d: Int)<!>