[ADD] inventory: new doc about receiving products in one step

[ADD] inventory: new doc about receiving products in one step

inventory/management/incoming.rst

@@ -7,5 +7,6 @@ Incoming Shipments
    :glob:
 
    incoming/handle_receipts
+   incoming/one_step
    incoming/two_steps
    incoming/three_steps

inventory/management/incoming/one_step.rst

@@ -0,0 +1,57 @@
+=======================================
+Process a Receipt in one step (Receipt)
+=======================================
+
+There is no configuration needed to receive in one step. The default
+incoming shipments are configured to be directly received from the
+vendors to the stock.
+
+However, if advanced routes have been activated and you set another
+incoming configuration on your warehouse, you can set it back to the
+one-step receipt configuration. To do so, go to *Configuration >
+Warehouses* and edit the warehouse in question.
+
+Set the *Incoming Shipments* option to *Receive goods directly (1
+step)*.
+
+.. image:: media/one_step_01.png
+   :align: center
+
+Create a Purchase Order
+=======================
+
+To create a *Request for Quotation*, go to the *Purchase*
+application and click on *Create*. Then, add some storable products to
+receive and confirm the *RfQ*.
+
+Notice that, now, we see 1 receipt associated with the purchase order
+you just created. If you click on the button, you will see your receipt
+order.
+
+.. image:: media/one_step_02.png
+   :align: center
+
+Process a Receipt
+=================
+
+You can also fin the receipt directly from the *Inventory* app. When
+on the dashboard, you can click the *1 TO PROCESS* button under the
+*Receipts* Kanban card. Then, you will see your receipt.
+
+.. image:: media/one_step_03.png
+   :align: center
+
+Now, enter the picking that you want to process. You will be able to
+click on *Validate* to complete the move directly as products coming
+from suppliers are considered as being always available.
+
+.. image:: media/one_step_04.png
+   :align: center
+
+Once you *Validate* the receipt, the products leave the *Supplier
+Location* to enter your *WH/Stock Location*. You can easily see that
+the receipt took place thanks to the status of the document, which is
+now *Done*.
+
+.. image:: media/one_step_05.png
+   :align: center