[ADD] studio: documentation export/import customizations (#705)

studio/use_cases.rst

@@ -11,3 +11,4 @@ Use Cases
    use_cases/views
    use_cases/rainbow_man
    use_cases/reports
+   use_cases/export_import

studio/use_cases/export_import.rst

@@ -0,0 +1,28 @@
+=========================
+Export and Import Modules
+=========================
+
+When you do customizations in Odoo Studio, a new module is created in your database, making it easy
+to use Studio for prototyping.
+
+To export these customizations, activate Studio on the main dashboard and, under the menu
+*Customizations*, click on *Export*. The default filename is *customizations.zip*.
+
+.. image:: media//export_import/customizations_menu.png
+   :align: center
+   :alt: View of the menu customizations in Odoo Studio
+
+| The module created contains the definition of custom models and fields, as well as the UI elements
+  of any customization in an XML format.
+| To import and install the customizations in another instance, connect to the destination database,
+  activate Studio and, under *Customizations*, click on *Import*.
+
+.. image:: media/export_import/import_modules.png
+   :align: center
+   :alt: View of the import modules window for Odoo Studio
+
+.. warning::
+   Studio does not know which apps are customized (because the same view can be modified on
+   different apps), therefore, it *does not* add the underlying modules as dependencies of the
+   exported module. In other words, the applications installed on the source database should be
+   installed on the destination database.