docs: use rustdoc links in markdown

[ElijahAhianyo]

Link references in docs to their respective rustdoc links

[m4tx]

Amazing work and you linked everything like a true Wikipedian 😉 Like I mentioned during our meeting, I think there's not much of a point in fixing the old versions of the guide. Eventually, we'll want to remove them, as they get decreasingly irrelevant. Thanks for putting the extra effort regardless!

Please have a look at the comment I left, and after addressing it, this will be ready to be merged.

[m4tx]

Suggested change

	/// Reference to features should follow the format `features@featue_name`, where
	/// Reference to features should follow the format `features@feature_name`, where

typo.

Also, for consistency, I think this should be feature@, rather than features@, similarly to trait@, struct@, etc. What do you think?

[ElijahAhianyo]

yeah we could do that. rustdocs uses features so I kind of just went with that so its much more intuitive with rustdocs, but I kind of agree feature is much more consistent

[m4tx]

Well, seems like at least there's no defined disambiguator for features, so we're free to choose either features or feature.

Thanks!