[Serialization] Reorganize module structure

plugins/kotlinx-serialization/testData/firMembers/classWithGenericParameters.kt

@@ -0,0 +1,23 @@
+// WITH_STDLIB
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+import kotlinx.serialization.builtins.*
+
+@Serializable
+class GenericBox<T, V>(
+    val i: Int,
+    val t: T,
+    val vs: List<V>
+)
+
+fun box(): String {
+    val box = GenericBox(42, "foo", listOf(true, false))
+    val serial = GenericBox.serializer(String.serializer(), Boolean.serializer())
+    val target = """{"i":42,"t":"foo","vs":[true,false]}"""
+    val s = Json.encodeToString(serial, box)
+    if (target != s) return "Incorrect serialization: $s"
+    val decoded = Json.decodeFromString(serial, s)
+    if (box.t != decoded.t || box.vs != decoded.vs) return "Incorrect deserialization"
+    return "OK"
+}