feat: Add id field to each item

[blaine-arcjet]

This is a big change so I'm welcome to any feedback!

I'd like to add an id field to each item that gives sort of a common identifier to each item.

This can be use to uniquely identify which pattern(s) matched a particular user agent.

Many of the IDs are just nameofcompany-crawler but I also have monitor and validator for tools that help with those things.

[monperrus]

thanks for the proposal.

the pattern itself is the identifier, I would not go into this additional maintenance complexity

[blaine-arcjet]

Okay. I need this ID for a some projects so if we don't include it in this upstream repo, I'll have to commit to a complete fork ☹️ but I understand.