[K/Wasm] Add simple TypeScript definitions generating ^KT-65009 Fixed

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/directives/WasmEnvironmentConfigurationDirectives.kt

@@ -43,4 +43,8 @@ object WasmEnvironmentConfigurationDirectives : SimpleDirectivesContainer() {
     val RUN_THIRD_PARTY_OPTIMIZER by directive(
         description = "Also run third-party optimizer (for now, only binaryen is supported) after the main compilation",
     )
+
+    val CHECK_TYPESCRIPT_DECLARATIONS by directive(
+        description = "Check typescript declarations generated by the compiler",
+    )
 }