Allow colorizing any type implementing a formatter trait

[hwittenborn]

Rust has several formatter traits, all of could be printed out (and likewise colored).

Currently this crate only provides a way to print via the Display trait - any formatting traits would have to be done via a method such as format!("{item:?}").blue(), which can get a bit clunky.

The proposed method to fix this is to allow any type to be formatted, as long as it implements the corresponding formatting type. I.e. if a type implements Debug, doing something like println!("{:?}", item.blue()) should work just fine.

owo-colors uses this method, and it's of my view that it's quite a good method of doing things. I think this crate should consider doing a similar approach for a v3, along with some other changes that people are requesting in this repository.

[hwittenborn]

Oh by the way, what are your thoughts on having a v3 @mackwic @kurtlawrence? I'd definitely like to get your guys' opinions before doing anything huge.

I was also thinking of moving the current codebase to a v2 branch and starting v3 work on master, which could allow some breaking PRs to start getting merged in. v3 wouldn't be published for a hot minute, it would just be in the codebase so people have a good place to start working on.

[kurtlawrence]

I think there are enough new features to justify a v3.

Maybe we mark PRs 'breaking' and then try to merge in all non-breaking PRs and do a final v2 cratesio release?

[hwittenborn]

Yeah I like that idea @kurtlawrence, I think that'd be good to keep things smooth. I can look at some PRs tomorrow and try to slim them down, and then all the v3 stuff can get started.