Stock picking report internal delivery address

This module changes how stock transfer reports behave for internal operations. Normally Odoo only prints a delivery address on a picking report when the goods are going to an external location. With this module, internal transfers also show the address.

The change is driven by a single rule on the stock.picking model. When a report asks whether the delivery address should be printed, the module checks three things: the transfer has at least one move line, there is a partner (either on the first move line or on the transfer itself), and the operation is either going to an external location or its operation type code is "internal". If all of these are true, the address is printed. In every other case, the original Odoo behaviour is kept.

There are no new menus, buttons, screens or settings. The module only affects the printed stock picking report, so users will see the delivery address appear on internal transfer documents without doing anything extra. It touches the stock.picking model and relies on the standard stock operation types.