[Enhancement] NFT: deprecate declarative macros.

[ruseinov]

Quick summary:

• This PR removes declarative macros that auto-implements NFT traits based on a Contract property implementing them.
• The result is clear and editable code.
• This introduces a touch more boilerplate, but allows for customisation and maintains backwards-compatibility.
• This also bumps package versions, it remains to be seen whether or not this is necessary.

Fixes #422

Continuation: #1041

[frol]

@ruseinov Nice! Looking at it now, it seems like a trivial change and while it adds the boilerplate, it follows Python Zen "explicit is better than implicit", and I like it. I am thinking that delegation of method calls could be a great thing, but at the same time external crates for trait methods delegation (1, 2) make the code more magical to me. Please, address the comments and I feel we are good to get it merged

[frol]

@ruseinov This PR is self-contained; I am ready to merge it overall. Would you like to submit a separate PR with the docs or would you like to include the docs in this PR?

[frol]

Let's remove duplication

[ruseinov]

@ruseinov This PR is self-contained; I am ready to merge it overall. Would you like to submit a separate PR with the docs or would you like to include the docs in this PR?

The docs are WIP, let’s merge when it’s done and cleaned up.

[ruseinov]

@frol Fixed the docs, I'm not sure yet how to best tackle more global docs and README.md though, but it's looking much better now.

[frol]

@ruseinov Overall, I am happy to merge it, but there are some minor discussion points to address.

[agostbiro]

Thanks for implementing this @ruseinov and for the detailed review @frol ! LGTM except for the small remaining comments.

I created #1049 and #1050 as follow up tasks.

[ruseinov]

Thanks for implementing this @ruseinov and for the detailed review @frol ! LGTM except for the small remaining comments.

I created #1049 and #1050 as follow up tasks.

Nice, no problem.

I'm not entirely sure about the links in deprecation notices, could you perhaps make a code suggestion to see how that's supposed to look?

[frol]

I added fully-qualified paths to the traits in the deprecation notes, so it is at least easier to search on the Internet