Added crate attribute to rustdoc rules (deprecated dep)

[UebelAndre]

In an effort to keep our naming conventions consistent, the crate attribute was added to the rustdoc rules.

Requires:

• Fixed inability to use crate attribute in wrapper rules with proc-macro targets. #807
• Organized examples #803

closes #512

[hlopko]

As with #807, the diff here is too large for me to conveniently review. Could you either ping me once requirement PRs are merged, or (preferably) decouple this PR from the other 2? To the naive me it seems they are fairly independent?

[UebelAndre]

As with #807, the diff here is too large for me to conveniently review. Could you either ping me once requirement PRs are merged, or (preferably) decouple this PR from the other 2? To the naive me it seems they are fairly independent?

Just trying to avoid conflict resolution 😅 It is unrelated but I'd rather focus on one at a time to avoid extra work.