Initial documentation for plugins framework

docs/configuration/optional-settings.md

@@ -299,6 +299,24 @@ Determine how many objects to display per page within each list of objects.
 
 ---
 
+## PLUGINS_CONFIG
+
+Default: Empty
+
+This parameter holds configuration settings for individual NetBox plugins. It is defined as a dictionary, with each key using the name of an installed plugin. The specific parameters supported are unique to each plugin: Reference the plugin's documentation to determine the supported parameters.
+
+Note that `PLUGINS_ENABLED` must be set to True for this to take effect.
+
+---
+
+## PLUGINS_ENABLED
+
+Default: `False`
+
+Enable [NetBox plugins](../../plugins/).
+
+---
+
 ## PREFER_IPV4
 
 Default: False