docs: add docs for sort_flags #646

Author: jaredhendrickson13

docs/COMMON_CONTROL_PARAMETERS.md

@@ -102,6 +102,21 @@ parameters you can use:
   behavior of this parameter varies based on the request method and endpoint type. Refer to the 
   [Sorting](QUERIES_FILTERS_AND_SORTING.md#sorting) section for more information.
 
+## sort_flags
+
+- Type: String
+- Default: `SORT_REGULAR`
+- Choices:
+    - `SORT_REGULAR`
+    - `SORT_NUMERIC`
+    - `SORT_STRING`
+    - `SORT_NATURAL`
+    - `SORT_FLAG_CASE`
+    - `SORT_FLAG_LOCALE_STRING`
+- Description: This parameter allows you to control the sorting behavior of the objects related to the endpoint. The
+  behavior of this parameter varies based on the request method and endpoint type. Refer to the
+  [Sorting](QUERIES_FILTERS_AND_SORTING.md#sorting) section for more information.
+
 ## sort_order
 
 - Type: String

docs/QUERIES_FILTERS_AND_SORTING.md

@@ -122,8 +122,8 @@ For advanced users, the REST API's framework allows for custom query filter clas
 ## Sorting
 
 Sorting can be used to order the data that is returned from the API based on specific criteria, as well as sorting the
-objects written to the pfSense configuration. Sorting is controlled by two common control parameters: 
-[`sort_by`](COMMON_CONTROL_PARAMETERS.md#sort_by) and [`sort_order`](COMMON_CONTROL_PARAMETERS.md#sort_order).
+objects written to the pfSense configuration. Sorting is controlled by three common control parameters: 
+[`sort_by`](COMMON_CONTROL_PARAMETERS.md#sort_by), [`sort_flags`](COMMON_CONTROL_PARAMETERS.md#sort_flags), and [`sort_order`](COMMON_CONTROL_PARAMETERS.md#sort_order).
 
 !!! Note
     - Sorting is only available for model objects that allow many instances, meaning multiple objects of its type can