feat : implement restaurant management system

src/main/java/dev/model/CartItem.java

@@ -0,0 +1,34 @@
+package dev.model;
+
+public class CartItem {
+
+    private MenuItem menuItem;
+
+    private int quantity;
+
+    public CartItem(MenuItem menuItem, int quantity)
+    {
+        this.menuItem = menuItem;
+        this.quantity = quantity;
+    }
+
+    public MenuItem getMenuItem()
+    {
+        return menuItem;
+    }
+
+    public void setMenuItem(MenuItem menuItem)
+    {
+        this.menuItem = menuItem;
+    }
+
+    public int getQuantity()
+    {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity)
+    {
+        this.quantity = quantity;
+    }
+}