refactor: extract common pagination properties into PaginationRequest and apply it in InstitutionContractListSearchModel

0_Framework/Application/PaginationRequest.cs

@@ -0,0 +1,7 @@
+namespace _0_Framework.Application;
+
+public class PaginationRequest
+{
+    public int PageIndex { get; set; } = 1;
+    public int PageSize { get; set; } = 30;
+}