refactor: move database-related projects to separate folder

SqlData/Application/Cqrs/Campus/Queries/GetCampusBasicInfoList/CampusBasicInfoDto.cs

@@ -0,0 +1,22 @@
+namespace Mirea.Api.DataAccess.Application.Cqrs.Campus.Queries.GetCampusBasicInfoList;
+
+/// <summary>
+/// Represents basic information about a campus.
+/// </summary>
+public class CampusBasicInfoDto
+{
+    /// <summary>
+    /// The unique identifier for the campus.
+    /// </summary>
+    public int Id { get; set; }
+
+    /// <summary>
+    /// The code name associated with the campus.
+    /// </summary>
+    public required string CodeName { get; set; }
+
+    /// <summary>
+    /// The full name of the campus.
+    /// </summary>
+    public string? FullName { get; set; }
+}