Stock Move Reservation Info

This module adds visibility on reservations without changing how stock works.

On the inventory quantities screens (the stock quant lists, including the editable inventory view), a Reserved Quantity column is shown next to the on-hand and available quantities. When a line has reserved quantity, an information button appears; clicking it opens a list of the reserved moves for that exact product, location, lot/serial and owner. That list shows the move, the related transfer, its origin document, the reserved quantity in the product's unit of measure, and a button to open the related picking form.

On the reserved moves list itself, each line also has an arrow button that opens the source transfer (picking) directly, so users can quickly find out which transfer or manufacturing order is holding the stock.

The module only extends existing stock screens (stock.quant and stock.move.line); it does not create new menus, and it does not change reservation logic, quantities or validations. It is purely an information and navigation aid for warehouse and planning users.