feat: restruction of admin sidebar, button slightly adjusted, member tiers header added, routing for sidbar adjusted

src/components/SettingsSidebar.js

@@ -5,9 +5,8 @@ import { CreditCard, Shield, Star, Palette, FileEdit } from 'lucide-react';
 const settingsItems = [
   { label: 'Stripe', path: '/admin/settings/stripe', icon: CreditCard },
   { label: 'Permissions', path: '/admin/settings/permissions', icon: Shield },
-  { label: 'Member Tiers', path: '/admin/settings/member-tiers', icon: Star },
   { label: 'Theme', path: '/admin/settings/theme', icon: Palette },
-  { label: 'Registration Form', path: '/admin/settings/registration', icon: FileEdit },
+
 ];
 
 const SettingsTabs = () => {