Refactors in UlxLuaValues, and add cursor-rewind to ReadLuaValues node.

Source/Integration/StreamBuffer.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "Common.h"
 #include "CoreMinimal.h"
 #include "lpx-basebuffer.hpp"
 
@@ -12,7 +13,7 @@ public:
     using string_type = std::string;
     using fvector_type = FVector;
     using dvector_type = FVector;
-    using luavalue_type = BaseLuaValue<std::string>;
+    using luavalue_type = LuaValue;
     void *basebuffer_malloc(size_t size) { return malloc(size); }
     void basebuffer_free(void *p) { free(p); }
     void clear_error_flags() { err_eof_on_read_ = err_string_too_long_ = err_integer_truncated_ = false; }