Add project files

T120B165-ImgBoard/Utils/PagedList.cs

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+namespace T120B165_ImgBoard.Utils;
+
+public class PagedList<T>(List<T> items, int pageNumber, int pageSize, int totalCount)
+{
+    public int CurrentPage { get; } = pageNumber;
+    public int PageSize { get; } = pageSize;
+    public int TotalCount { get; } = totalCount;
+    public int TotalPages => (int) Math.Ceiling((double)TotalCount / PageSize);
+
+    public List<T> Items { get; } = items;
+}