Add paragraph on ordering and grouping of properties in the configuration file

Author: Heliodex

Docs/src/content/docs/guides/config.mdoc

@@ -9,6 +9,8 @@ This guide provides information on the configuration file for Mercury Core, loca
 	While the configuration file aims to give control over as many options as possible in a pragmatic manner, the most effective way to tweak Mercury Core and other components of the Mercury suite will always be to modify their source code directly.
 {% /aside %}
 
+Properties are grouped in ways that are intended to be intuitive, though other than this there are no strict rules on how they are organised. These groups, the names of the properties, and their default values, are all subject to change, and may be rearranged, renamed, or removed in future updates. The order of properties listed here is in accordance with how they appear in the reference configuration file, though they can be rearranged in any way as required.
+
 ## Properties
 
 ### Top-level