Feature: Integrate Digital Twin notion into the portal

[kbeaugrand]

Is your feature request related to a problem? Please describe.
With the IoT platform, we sometimes use the Digital Twin notion to map the data to an ubiquitous model.

Describe the solution you'd like
Have dedicated screen to create/manage DigitalTwins models in the platform.
Those models should not be directly correlated to devices.

Describe alternatives you've considered
N/A

Additional context
N/A