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/user-guide/taxes/index.md

@@ -1,5 +1,6 @@
 ---
 sidebar_position: 1
+description: 'Medusa admin allows merchants to manage their taxes. Merchants can specify and configure taxes per region.'
 ---
 
 # Taxes Overview

docs/content/user-guide/taxes/manage.md

@@ -1,5 +1,7 @@
 ---
 sidebar_position: 2
+description: 'This user guide explains how to manage taxes on the Medusa admin. Learn how to edit their configurations.'
+addHowToData: true
 ---
 
 # Manage Taxes

docs/content/user-guide/taxes/tax-inclusive.mdx

@@ -1,5 +1,7 @@
 ---
 sidebar_position: 5
+description: 'This user guide explains how to manage tax inclusive pricing on the Medusa admin.'
+addHowToData: true
 ---
 
 import UiIcon from '@site/src/components/UiIcon';

docs/content/user-guide/taxes/tax-overrides.mdx

@@ -1,5 +1,7 @@
 ---
 sidebar_position: 4
+description: 'This user guide explains how to manage tax overrides on the Medusa admin. Learn how to add, edit, and delete overrides.'
+addHowToData: true
 ---
 
 import UiIcon from '@site/src/components/UiIcon';

docs/content/user-guide/taxes/tax-rates.mdx

@@ -1,5 +1,7 @@
 ---
 sidebar_position: 3
+description: 'This user guide explains how to manage tax rates on the Medusa admin. Learn how to create, edit, and delete tax rates.'
+addHowToData: true
 ---
 
 import UiIcon from '@site/src/components/UiIcon';