This commit adds a new category of image shapes: Devices.
The purpose is to give the possibility to add images in device mockups
with the image shapes.
To use it correctly the image needs to be in a specific ratio depending
on the shape. To help the user to have the perfect render, an average
resolution is shown when hovering the thumbnail of the shape.
task-2666049
closesodoo/odoo#79068
Related: odoo/design-themes#525
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>
