Add template namespace support to Joomla 4.3 (#47)

* Add template namespace support to Joomla 4.3

* Update migrations/42-43/new-features.md

Co-authored-by: Brian Teeman <[email protected]>

Author: HLeithner

docs/general-concept/namespace.md

@@ -1,8 +1,19 @@
 Namespace
 =========
 Description of the namespace concept
+
 :::caution TODO
 
 This page is unfinished, please use the **Edit this Page** link at the bottom of this page to help make it more useful.
 
 :::
+
+Namespaces for Templates
+------------------------
+
+The namespace is used for autoloading helper classes located in the folder provided
+in the path attribute of the manifest xml file.
+
+Suggest Namespace:
+XML: `Vendorname\Template\TemplateName` Path Attribute: `src`   
+PHP: `Vendorname\Template\TemplateName\Site` Location: `templates/TemplateName/src` 

migrations/42-43/new-features.md

@@ -6,6 +6,19 @@ New features
 ===============
 All the new features that have been added to this version.
 Any changes in best practice.
+
+
+Support Namespace for Templates
+-------------------------------
+
+Starting with Joomla! 4.3 it's possible to set a namespace for the template. This
+namespace is used for autoloading helper classes located in the folder provided
+in the path attribute of the manifest xml file.
+
+Suggest Namespace:
+XML: `Vendorname\Template\TemplateName` Path Attribute: `src`   
+PHP: `Vendorname\Template\TemplateName\Site` Location: `templates/TemplateName/src` 
+
 :::caution TODO
 
 This page is unfinished, please use the **Edit this Page** link at the bottom of this page to help make it more useful.