[ADD] inventory: How to handle lots and serial numbers with barcodes?

https://docs.google.com/document/d/1teo5up1t6EQt4NtSc8c0kznh8SohR02TIAnFtJOQsos/edit#

inventory/barcode/operations/lots_serial_numbers.rst

@@ -1,3 +1,46 @@
 ====================================================
 How to handle lots and serial numbers with barcodes?
-====================================================
+====================================================
+
+Lots Numbers can be encoded from incoming shipments, internal moves and
+outgoing deliveries:
+
+-   In the barcode interface, **scan** the products you want create a lot from
+
+-   If this product should be manage by lots, a window opens to help you
+    scan the lots/serial numbers
+
+-   **Scan** a lot barcode, **type** one manually or **leave empty** to generate one
+    automatically
+
+-   Click or scan **Validate** once you are done
+
+What is the difference between **Lots** and **Serial Numbers**?
+
+-   **Lot** numbers are attributed to several identical products, so each
+    time you scan a lot number, Odoo will add one on the product
+    count.
+
+-   On the opposite, a **serial number** is unique, and represented by only
+    one barcode, sticked on only one item. This means that Odoo won't
+    accept scanning the same serial number more than once per
+    operation.
+
+.. image:: media/lots_serial_numbers01.png
+    :align: center
+
+Here, we configured **Lu - Petit Beukelaer** tracking by lots.
+
+.. image:: media/lots_serial_numbers04.png
+    :align: center
+
+Scan a product from this incoming shipment, then scan the lot number of
+each product (you can also use the keyboard).
+
+.. image:: media/lots_serial_numbers02.png
+    :align: center
+
+Click save/scan **Validate** and you are done.
+
+.. image:: media/lots_serial_numbers03.png
+    :align: center