serde aux function to get names for fields as they are serialized

[ta32]

from serde-rs/serde#1110

Do you prefer a different method name?

I combined the function to get the field names from structs and enums so its easier to use. It was possible to use the wrong method for the type for the original implementation.

I will try address any comments.

[iddm]

Looks simple and fine with me. Probably we will just need to remove one line and address the clippy and formatting issues if they arise during the pipelines. Once everything is done, I'll merge. Thank you!

[iddm]

There are some unsuccessful pipelines. I suggest you run cargo clippy and cargo fmt locally and that will help you solve everything easily.

[iddm]

Looks fine in general, I can perform the minor fixes myself should you prefer.
Thank you for your contribution! :-)

[ta32]

Sure, edits by maintainer is checked for this PR.

I didn't understand what you meant by the removing example colon so I left that to you, I saw it in other places?
Feel free to make any more edits if you need to thanks :)

[iddm]

Sure, edits by maintainer is checked for this PR.

I didn't understand what you meant by the removing example colon so I left that to you, I saw it in other places?
Feel free to make any more edits if you need to thanks :)

Yes, so in "cool" markdown, the colons after headers aren't welcomed, just a style. For example, here you won't see : after features or Optional features headers.

[iddm]

I'll merge once the checks are done. Thanks again!