Give DynamicReferenceValue a public constructor for custom extending

backend/codegen/src/main/kotlin/net/mamoe/mirai/console/codegen/ValuesCodegen.kt

@@ -264,7 +264,7 @@ sealed class Value<T : Any> : ReadWriteProperty<Setting, T> {
          * 只引用这个对象, 而不跟踪其成员.
          * 仅适用于基础类型, 用于 mutable list/map 等情况; 或标注了 [Serializable] 的类.
          */
-        abstract class DynamicReferenceValue<T : Any> internal constructor() : Value<T>()
+        abstract class DynamicReferenceValue<T : Any> : Value<T>()
     """
     )
 }

backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Setting.kt

@@ -59,6 +59,9 @@ abstract class Setting : SettingImpl() {
     override fun toString(): String = yamlForToString.stringify(this.serializer, this)
 }
 
+/**
+ * 用于更新或保存这个 [Value] 的序列化器.
+ */
 @Suppress("UNCHECKED_CAST")
 val <T : Setting> T.serializer: KSerializer<T>
     get() = kotlinSerializer as KSerializer<T>