Move "Kit" class product categories to appropriate parent category

The subcategories of the "Official Hardware" category are to be organized under a subcategory for each of the product
classes. These product classes are defined by the hardware documentation home page.

That hardware documentation places several products under a class named "KIts".

Previously the categories for the products of these classes were directly under the "Official Hardware" top level
category. They are hereby moved under the appropriate "Kits" product class parent category.

Author: per1234

content/categories/official-hardware/arduino-starter-kit/_topics/how-to-get-the-best-out-of-this-forum

@@ -8,4 +8,4 @@
 
 ## Published At
 
-https://forum.arduino.cc/c/official-hardware/arduino-starter-kit/63
+https://forum.arduino.cc/c/official-hardware/kits/arduino-starter-kit/63

content/categories/official-hardware/arduino-starter-kit/README.md renamed to content/categories/official-hardware/kits/arduino-starter-kit/README.md

@@ -0,0 +1 @@
+../../../../../_topics/how-to-get-the-best-out-of-this-forum

content/categories/official-hardware/arduino-starter-kit/_pins.md renamed to content/categories/official-hardware/kits/arduino-starter-kit/_pins.md

@@ -26,6 +26,7 @@
   - Emergency Response: Covid-19 Projects
 - Official Hardware
   - Kits
+    - The Arduino Starter Kit
   - Portenta Family
     - Portenta C33
     - Portenta H7
@@ -76,7 +77,6 @@
     - Edge Control
     - Portenta Machine Control
     - WisGate Gateways
-  - The Arduino Starter Kit
   - Nicla family
     - Nicla Sense ME
     - Nicla Vision