Add Device Authorization Grant

[Aaron-Ritter]

Add Device Authorization Grant

Problem

The SDK is lacking Device Authorization Grant.

Solution

Implement Device Authorization Grant based on https://github.com/openid/AppAuth-iOS?tab=readme-ov-file#supported-versions-2

Alternatives/workarounds

N/A

Additional context

https://datatracker.ietf.org/doc/html/rfc8628

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