Allow Identification via QR Code

**Is your feature request related to a problem? Please describe.**
In certain situations, typing out a username and password is too cumbersome (especially on devices like consoles and smart TVs and/or if using a long password), and logging in passwordless on that device is not an option.

**Describe the solution you'd like**
I'd like to be able to identify/log into an account by scanning a QR code and using another device to log into the account, similar to how Discord and Steam let the user log in by scanning a QR code.

**Describe alternatives you've considered**
Currently, I'm using social login via Discord to solve this problem since as mentioned, it allows the user to sign in with a QR code. However, it requires me to have a Discord account and log into it on the other device, but I would prefer if I could skip the Discord login and stick entirely to Authentik instead.

**Additional context**
I took a look at #9642 since it aligned most closely with what I'm looking for based on searching the issues for "QR Code," but it seems to request the opposite of what I want: "This would kinda work like the QR Code Auth in WhatsApp Web, Steam or Discord but in reverse." In contrast, I'd like it to work pretty much exactly how Steam or Discord work.