[ADD] inventory: How to do an internal transfer?

https://docs.google.com/document/d/1AI3pDERUmEzSP0vo8_yhciLXRSKUvo264jDOCAlT0Xs/edit#heading=h.d0n5059yoi8b

inventory/barcode/operations/internal.rst

@@ -1,3 +1,24 @@
 ===============================
 How to do an internal transfer?
-===============================
+===============================
+
+In Odoo, there are two types of internal transfers:
+
+-   Those initiated automatically by the system (for example, a quality
+    control)
+
+-   Those created by a worker (for example, through the internal transfer
+    area of the dashboard).
+
+To make an Internal Transfer:
+
+1. From the home of the barcode application, scan the **source location**
+
+2. Pick up and **scan the products**
+
+3. Scan the **destination location**
+
+4. **Validate** the transfer to finish it
+
+.. image:: media/internal01.png
+    :align: center