Restructured projects and created Services for permissions and users

HopFrame.Database/Models/PermissionGroup.cs

@@ -0,0 +1,9 @@
+namespace HopFrame.Database.Models;
+
+public sealed class PermissionGroup : IPermissionOwner {
+    public string Name { get; init; }
+    public bool IsDefaultGroup { get; set; }
+    public string Description { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public IList<Permission> Permissions { get; set; }
+}