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

static/css/catalog.css

@@ -0,0 +1,10 @@
+aside {
+    width: 250px;
+}
+
+.catalog-container {
+    display: flex;
+    flex-direction: row;
+    justify-content: space-between;
+    gap: 20px;
+}

static/css/services.css

@@ -60,7 +60,7 @@
 
 .large {
     margin-top: 40px;
-    padding-bottom: 130px;
+    margin-bottom: 130px;
     height: 300px;
 
     display: flex;

static/css/shipping.css

@@ -153,5 +153,5 @@
 }
 
 .shipping-content {
-    padding-bottom: 120px;
+    margin-bottom: 120px;
 }