[ADD] stock_diagnosis: Scripts to detect discrepancies by quants and moves

[luisg123v]

The following scripts are added:

• quants_greater_in_stock_moves.sql: detect differences between quants and incoming stock moves
• quants_differ_all_stock_moves.sql detect differences between quants and all stock moves (incoming and outgoing)
• quants_differ_logistic_qty.sql: detect differences between quants and logistic quantities, when the module stock_cost_segmentation [1] is installed

For more information, check the documentation on the mentioned scripts.

[1] https://github.com/Vauxoo/addons-vauxoo/tree/11.0/stock_cost_segmentation