Group `plugdev` does not exist on all linux distributions

[tomas-pecserke]

It has been pointed out to us, that group plugdev is specific to Debian-based Linux distributions.
This causes the Udev rule in the manual incorrect for users of other distributions.
We should therefore try to find a distribution agnostic solution to manage WebUSB device permissions.

After a brief research I discovered a uaccess tag based approach is considered by many as preferable to group based.
Applying TAG+="uaccess" instead of the previous MODE="0660", GROUP="plugdev" should allow the current session user to access the device.

This same issue was presented to this project.

[marcos-diaz]

I was experimenting with TAG+="uaccess" with not much success in the Steam Deck, but it is true that it could be a better approach for most distros.

It is very tricky to write these instructions right, because it seems each distro is having fun with udev rules and tricks in their own ways.

Should we have 3 Linux categories instead?:

• Ubuntu / Debian-based.
• Steam Deck / Arch.
• Other Linux???.

[Jazztache]

I think that this would be a good change. I think I saw it mentioned when I was researching an issue I was having.
This might be the root cause of this: #109