[ADD] inventory: How to create a new warehouse?

https://docs.google.com/document/d/1uCsZw6x42wyBX2GWFbMpCX2pwbjEdyYjm6IwXiQF38Y/edit#

inventory/settings/warehouses/warehouse_creation.rst

@@ -1,3 +1,48 @@
 ==============================
 How to create a new warehouse?
 ==============================
+
+Configuration
+=============
+
+Creating a new warehouse
+------------------------
+
+In order to be able to create a new warehouse, you must allow the system
+to manage multiple locations. In the **Inventory** module, open the menu
+:menuselection:`Settings --> Configuration`. In the **Location &
+Warehouse** section, tick the **Manage several locations per warehouse**
+box, then click on **apply**.
+
+.. image:: media/warehouse_creation02.png
+   :align: center
+
+Open the menu :menuselection:`Configuration --> Warehouse Management --> Warehouses`
+
+In the warehouses screen, click on **Create**. A new screen appears, with
+3 fields :
+
+-   In **Warehouse Name**, insert the full name of the warehouse.
+
+-   In the **Short Name** field, insert a 5-characters code for your
+    warehouse. Keep in mind that this code is the one that will appear in
+    the lists, so make sure you choose a name that is easy to understand
+    and easy to enter.
+
+-   In the **Address** field, you can select an existing company or create
+    one on-the-go. Therefore, the address of your warehouse will be the same
+    as the one of the company you selected. You can also leave this field
+    empty and edit it afterwards.
+
+.. image:: media/warehouse_creation01.png
+   :align: center
+
+Click on **Save** to finish configuring your new warehouse.
+
+.. note::
+    When you create a warehouse, the system will create the necessary 
+    picking types and main child locations for this main location in the background.
+
+.. seealso::
+    * :doc:`difference_warehouse_location`
+    * :doc:`location_creation`