Add specialized material suppliers (Rockwool, 3M, Langevin Forest, Villeneuve, Acier Ouellette)

Several users are requesting the addition of new suppliers and manufacturers of specialized materials for their construction projects.

• Langevin Forest: Successfully added to the list of retailers.
• Rockwool and 3M: As manufacturers, they do not list their prices online. Direct integration is not possible at this time. We suggest using existing retailers (Rona, Home Depot, Canac). Direct agreements with these manufacturers will be considered once the platform has more members.
• Villeneuve and Acier Ouellette: Cannot be added at this time, as no prices are publicly displayed on their websites.

Alternative solution: For unsupported retailers, you can import price lists in PDF or Excel format, or create items manually and modify the assemblies accordingly.