Restructured projects and created Services for permissions and users

HopFrame.Database/Models/User.cs

@@ -1,9 +1,9 @@
 namespace HopFrame.Database.Models;
 
-public class User {
-    public Guid Id { get; set; }
+public sealed class User : IPermissionOwner {
+    public Guid Id { get; init; }
     public string Username { get; set; }
     public string Email { get; set; }
     public DateTime CreatedAt { get; set; }
-    public IList<string> Permissions { get; set; }
+    public IList<Permission> Permissions { get; set; }
 }