Initial commit - Initial update to documentation with SKU

Author: TaddyHC

content/hardware/03.nano/boards/nano-matter/datasheet/datasheet.md

@@ -1,5 +1,5 @@
 ---
-identifier: ABX00112
+identifier: ABX00112-ABX00137
 title: Arduino® Nano Matter
 type: maker
 author: José Bagur, Christopher Méndez

content/hardware/03.nano/boards/nano-matter/product.md

@@ -3,7 +3,7 @@ title: Nano Matter
 url_shop: https://arduino.to/nano-matter
 primary_button_url: /tutorials/nano-matter/user-manual/
 primary_button_title: User Manual
-sku: [ABX00112]
+sku: [ABX00112, ABX00137]
 core: arduino:mbed_nano
 certifications: [CE, UKCA]
 ---

content/hardware/03.nano/boards/nano-matter/tutorials/01.user-manual/content.md

@@ -91,11 +91,13 @@ The complete STEP files are available and downloadable from the link below:
 
 ### Form Factor
 
-The Nano Matter board features castellated pins, which are ideal for integrating the board into final solutions.
+The Nano Matter (ABX00112) board features castellated pins, which are ideal for integrating the board into final solutions.
 
-You can easily solder the Nano Matter in your custom PCB, since the board does not present any bottom-mounted components.
+You can easily solder the Nano Matter (ABX00112) in your custom PCB, since the board does not present any bottom-mounted components.
 
-![Nano Matter castellated pins](assets/castellated-2.png)
+![Nano Matter (ABX00112) castellated pins](assets/castellated-2.png)
+
+The Nano Matter with pre-installed headers (ABX00137) is also available, providing easy access for probing and testing through the headers.
 
 ## First Use
 ### Powering the Board