Add lead time for production
Currently, the productions are supposed to only last 1 day.
This means that the input moves have the same planned date as the output.
But some kind of productions could last longer than 1 day and so the input moves should be planned earlier.
The proposal is to add a lead time on the BOM (the duration of a production is mainly linked to its BOM, I think) and to add start dates on the production (which will be automatically computed out of the planned date and the BOM lead time).