refactor: admin panel nav menu

Author: hamed-shirbandi

src/2-Clients/AdminPanel/Pages/Shared/NavMenu.razor

@@ -1,4 +1,5 @@
-@using CodeBlock.DevKit.Web.Blazor.Server.Attributes
+@using CanBeYours.Application.Helpers
+@using CodeBlock.DevKit.Web.Blazor.Server.Attributes
 @inherits CustomNavMenu
 @attribute [ReplaceBaseComponent]
 
@@ -13,7 +14,7 @@
 
     <div class="collapse" id="demo-menu-group">
 
-        @if (CurrentUser.HasPermission("DemoThings"))
+        @if (CurrentUser.HasPermission(Permissions.Demo.DEMO_THINGS))
         {
             <div class="nav-item">
                 <NavLink @onclick="base.HandleNavItemClicked" class="nav-link ms-2" href="/demo-things">