[ADD] Website_Sale_Layout: Added a module to implement a layout like sal...

- Task: https://www.odoo.com/web#id=8216&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/r.sVzvgjhEixlrKNDZ
add discount lable also. no discount label appear.