feat: Interfaces generate with associated_types

[codecov[bot]]

Codecov Report

Attention: 27 lines in your changes are missing coverage. Please review.

Comparison is base (4b65245) 86.55% compared to head (4124c47) 81.48%.

Files	Patch %	Lines
sylvia-derive/src/associated_types.rs	69.44%	11 Missing :warning:
sylvia-derive/src/message.rs	91.52%	10 Missing :warning:
sylvia-derive/src/check_generics.rs	14.28%	6 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## feat/generics_forwarding #281 +/- ## ============================================================ - Coverage 86.55% 81.48% -5.08% ============================================================ Files 25 28 +3 Lines 1830 1923 +93 ============================================================ - Hits 1584 1567 -17 - Misses 246 356 +110 ```

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