Added missing Attribute Definitions

[JohannesHatke]

I saw that Attribute Definitions were missing so i added them.
I also added a few tests and changed the relevant ones.
The enum members now all contain a String for the name of the attribute.

[marcelbuesing]

Hey Johannes, thank you for bearing with me. This looks great! Would you mind fixing those small CI issues?

[JohannesHatke]

Sure, i'll get on that. Sorry for the open and close, just a misclick :D

[JohannesHatke]

This is my first time working with github actions and unfortunately the rust toolchain that's used in the ci is very different from my local one (newest stable).
Thats why i deleted a lot in the deny.toml file. All of the warnings in the cargo deny actions are now depreceated.
The fmt changes made no sense to me, because without the take_till import it wont compile. Could you take a look at that?

[nyurik]

I wonder if these would be better to do via the new lexer https://github.com/oxibus/can-dbc-pest - the structs might be similar, but all the lexing logic would be in the pest crate