CLI doc

docs/cli.rst

@@ -1,2 +1,25 @@
 Command Line Interface
 ######################
+
+The plugin adds a scan command to the composer.
+
+``licenses:scan``
+=================
+
+.. code-block:: bash
+
+    composer licenses:scan
+
+Lists installed packages that do not conform to the license policy.
+
+.. code-block:: none
+
+    $ composer licenses:scan
+    npm-asset/jquery-form has forbidden license: (LGPL-2.1+ OR MIT)
+
+or
+
+.. code-block:: none
+
+    $ composer licenses:scan
+    All licenses conform to your policy