More refurbishment

[woodruffw]

This is my sequel to #3 🙂

Key changes:

• Made most of the modules and structure fields pub by default, preserving interior consistency by marking the structs with #[readonly::make]
• Removed the mandatory documentation enforcement (since it was producing hundreds of redundant errors)
• Rewrite some of the uses to reduce duplication
• Commented out unused fields in the intermediate serde structs (since serde will simply skip unknown fields)

Let me know what you think (especially if you think I went a little too overboard on chasing zero warnings).

[xeals]

Most looks pretty reasonable. I probably had some idea in mind RE: visibility of collections and the functions that are otherwise unused at the moment, but I have no idea what it could have been, so happy to expose those.

Commented out unused fields in the intermediate serde structs (since serde will simply skip unknown fields)

Leaving them commented for documentation is good.

[woodruffw]

Should be good for another pass. I've also run cargo fix --edition to modernize the library to Rust 2021.

[xeals]

LGTM. Thanks again!

[woodruffw]

No problem! Thanks for the fast review and merge. I'll do a third (and final) round for simplifying some of the deserialization traits, and then I'll finally stop 🙂