feat: add sidebar and item list to catalog page, enable DEBUG mode for development

- Created `side-bar.html` and `item-list.html` fragments for catalog page layout
- Updated `catalog/index.html` to include sidebar and item list templates
- Added styles for catalog layout in `catalog.css`
- Enabled `DEBUG=True` in settings for local development
- Adjusted CSS in shipping and services for consistent spacing

items/views.py

@@ -3,7 +3,7 @@ from dataclasses import dataclass
 from django.http import HttpRequest, HttpResponse, Http404
 from django.shortcuts import render, redirect
 
-from items.models import Category
+from items.models import Category, Item
 
 
 # Create your views here.
@@ -25,5 +25,6 @@ def index(request: HttpRequest, category: str | None = None) -> HttpResponse:
 
     return render(request, 'catalog/index.html', {
         'categories': Category.objects.all(),
+        'items': Item.objects.all(),
         'selected_category': selected_category
     })