docs: Add documentation for the config command

docs/documentation/config.md

@@ -1,10 +1,12 @@
 <!-- Links in /docs/documentation should NOT have `.md` at the end, because they end up in our wiki at release. -->
 
-# ng get
+# ng config
 
 ## Overview
-`ng get [key]` Get a value from the configuration.
+`ng config [key] [value]` Get/set configuration values.
 `[key]` should be in JSON path format. Example: `a[3].foo.bar[2]`.
+If only the `[key]` is provided it will get the value.
+If both the `[key]` and `[value]` are provided it will set the value.
 
 ## Options
 <details>
@@ -13,24 +15,6 @@
     <code>--global</code> <em>default value: false</em>
   </p>
   <p>
-    Get the value in the global configuration (in your home directory).
-  </p>
-</details>
-
-
-# ng set
-
-## Overview
-`ng set [key]=[value]` Set a value in the configuration.
-`[key]` should be in JSON path format. Example: `a[3].foo.bar[2]`.
-
-## Options
-<details>
-  <summary>global</summary>
-  <p>
-    <code>--global</code> <em>default value: false</em>
-  </p>
-  <p>
-    Get the value in the global configuration (in your home directory).
+    Get/set the value in the global configuration (in your home directory).
   </p>
 </details>