docs: improved SEO of documentation (#3117)

* docs: added description to documentation pages

* docs: added more descriptions

* docs: finished improving meta description

* docs: added searchbox structured data

* docs: added breadcrumbs structured data

* docs: added how to structured data

* docs: improved 404 page

* docs: added how-to frontmatter option

docs/content/advanced/storefront/customer-profiles.mdx

@@ -1,3 +1,8 @@
+---
+description: 'Learn how to implement customer account functionalities in your storefront using the REST APIs. This includes implementing customer registration, login, edit profile, and more.'
+addHowToData: true
+---
+
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 

docs/content/advanced/storefront/handle-order-edits.mdx

@@ -1,7 +1,12 @@
+---
+description: 'Learn how to implement order-edit related features in the storefront using REST APIs. This includes showing the customer order-edit requests, authorizing additional payments, and confirming or declining order edits.'
+addHowToData: true
+---
+
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 
-# How to Handle an Order Edit
+# How to Handle an Order Edit in Storefront
 
 In this document, you’ll learn how to allow a customer to confirm or decline an Order Edit.
 

docs/content/advanced/storefront/how-to-implement-checkout-flow.mdx

@@ -1,3 +1,8 @@
+---
+description: 'Learn how to implement the checkout flow in your storefront using the REST APIs. This includes adding steps related to shipping and payment, then placing the order.'
+addHowToData: true
+---
+
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 

docs/content/advanced/storefront/implement-claim-order.mdx

@@ -1,7 +1,12 @@
+---
+description: 'Learn how to implement the order-claim flow in the storefront. This includes allowing customers to claim their orders, and verify a claim to an order.'
+addHowToData: true
+---
+
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 
-# How to Implement Claim Order Flow
+# How to Implement Claim Order Flow in Storefront
 
 In this document, you’ll learn how to implement the claim order flow in a storefront to allow customers to claim their orders.
 

docs/content/advanced/storefront/use-discounts-in-checkout.mdx

@@ -1,3 +1,8 @@
+---
+description: 'Learn how to implement discount functionalities in your storefront using the REST APIs. This includes adding a discount to the cart, showing the discount details, and removing the discount from the cart.'
+addHowToData: true
+---
+
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 

docs/content/advanced/storefront/use-gift-cards.mdx

@@ -1,3 +1,8 @@
+---
+description: 'Learn how to implement gift-card related functionalities in your storefront using the REST APIs. This includes showing the gift card to customers and redeeming the gift card during checkout.'
+addHowToData: true
+---
+
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 

docs/content/advanced/storefront/use-regions.mdx

@@ -1,3 +1,8 @@
+---
+description: 'Learn how to implement region-related functionalities on your storefront using the REST APIs. This includes showing the customer available regions, showing product prices, and setting the region of a cart.'
+addHowToData: true
+---
+
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 

docs/content/advanced/storefront/use-sales-channels.mdx

@@ -1,3 +1,8 @@
+---
+description: 'Learn how to implement sales channel functionalities in the storefront using REST APIs. This includes filtering products by Sales Channel and associating a cart with a sales channel.'
+addHowToData: true
+---
+
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';