The odoo.addons.web.controllers.main module was a very long bloated file
where many different controllers were concatened. It proved difficult to
work on that file on a regular basis,mainly because ctrl-p "web main.py"
was not pointing the right file.
In this work the file has been split on the basic 1 controller = 1 file.
The original way of importing stuff (through main.py) is still possible
thanks to deprecated aliases.
Part-of: odoo/odoo#87571
Simon Genin (ges)