Attribute overhaul

[jamesbt365]

Supersedes #3243.
Fixes #2438.

TODO:

• Add attribute to force specific interface on Linux & unify attributes to "Interface".
• Restore FeatureInitDelayMs attribute.
• Add support for specific identifiers via DigitizerIdentifiers.
• Document changes in the codebase.
• Modify all configurations to include new attributes.

I have something I'm not the most sure on right now, should a method be implemented somewhere to get the combined attributes? Right now it has absolutely no demand and its not complex logic to begin with, and use for combined attributes only are required in one spot, so its not like any code duplication will happen if we don't implement one.

At this time I'm not going to add support for FeatureInitDelayMs or libinputoverride in specific device identifiers, this is not needed and just increases complexity, but implementing the above would amend that. But considering the usage of delay (only intuos3 and on ALL tablets regardless of identifier) there is absolutely no need to implement support into the identifiers too.

Reminder to submit a pull request for web once this is merged.

The most recent commit may break WinUSB?

[gonX]

Probably a bit late that I thought of this, but wouldn't the attribute better be defined as a new property in the digitizer identifier?

[jamesbt365]

Probably a bit late that I thought of this, but wouldn't the attribute better be defined as a new property in the digitizer identifier?

This probably isn't the best case considering improving the detection scheme further would add extra attributes, putting extra filters in place. See #3011 for what else could be added in the future.

[jamesbt365]

#3276 requires Interface 0, there are 3 interfaces all with the same input and output lengths.

[jamesbt365]

Will rebase this PR and backport it when we close in on the next release and merge some configurations, its not fair on others to rebase 70+ configuration pull requests because i changed the configuration format.