feat(stackable-versioned-macros): Handle attribute forwarding / doc generation

[NickLarsenNZ]

Description

Part of stackabletech/issues#507

• Forward all struct and field attributes (this includes docs).
  ⚠️ There is a problem with adding derive attributes. Rust Analyzer panics.
• Allow version specific docs that carry across to future versions

Definition of Done Checklist

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1. Integration tests passed (for non trivial changes)

Reviewer

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1. Code contains useful comments
2. (Integration-)Test cases added
3. Documentation added or updated
4. Changelog updated
5. Cargo.toml only contains references to git tags (not specific commits or branches)

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1. Feature Tracker has been updated
2. Proper release label has been added

[NickLarsenNZ]

Closed in favour of #847 (it was easier to reimplement after the refactor, and deal with merge conflicts).