Add support for multiple keyboards

[technobulb]

Description of the new feature / enhancement

Add support for Powertoys to recognize from which device it is receiving the input and react differently based on the device mapping.

Scenario when this would be used?

If I am using 2 keyboards, I want to be able to map them independently.
I also have a 6 key "customizable" keyboard that I want to set the keys for, but they are recognized as ABCD keys, so it would also ruin my regular keyboard setup.

Supporting information

From Powertoys documentation:
Can I have different key mappings across multiple keyboards?
Currently no. We are not aware of an API where we can see the input and which device it came from. The typical use case here is a laptop with an external keyboard connected.

Others have done it successfully:
http://www.hidmacros.eu/
See also
https://mediachance.com/multikeyboard/

[crutkas]

In a perfect world, this would be done via #1460 but until we have a proper way to detect keys based on keyboard, /dup #1881 would be how we'd do this. You'd create some type of profile.

[microsoft-github-policy-service]

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!