- Split driver.py to multiple files
- Remove hw_proxy module as most of its routes were not used and
  move remaingin routes to a controller in hw_drivers
- Add missing coding and license lines at the beginning of files
- Reorder imports and remove unused ones
- Rename device_id to device_identifier for clarity
- Rename screen to display for consistency
- Other minors improvements

TaskID: 1973956

Improve the implementation of IoT.
Allow both-direction communication between iot box and devices.

Now a device can send its value / status as soon as it changes. Not only when he receives a request.

Now the box have only 3 routes:

/hw_drivers/action
parameter: session_id, device_id, data
used to ask at a device to make a action (take picture, make print, ect...)

/hw_drivers/event
parameter: listener
listener is a dict where you have the session_id and a list of device_id to listen
this route wait to answer that we call device_changed for a device_id with data or value

/hw_drivers/box/connect
parameter: token
used to register the box to a Odoo database
token contain the url of Odoo database and a unique number that allow the IoT Box
to connect box in the hour

task : 1906910

- Routes to get device/driver statuses from the browser
- Framework for managing and downloading drivers for devices
connected to the IoT Box
- Automatic detection of printers and cameras in the network
- Built-in detection for USB and Bluetooth LE devices and checking
if a driver matches the device
- Authentication of the box into Odoo
- Inform Odoo of the connected devices and giving them a unique
identifier so they can be called from the browser

Thanks to qle, specially for fswebcam and cups