feat: Impl interfaces with associated types on generic contract

[codecov[bot]]

Codecov Report

Attention: 17 lines in your changes are missing coverage. Please review.

Comparison is base (612df7a) 80.94% compared to head (1dd5549) 80.98%.

Files	Patch %	Lines
sylvia-derive/src/associated_types.rs	68.42%	6 Missing :warning:
sylvia-derive/src/multitest.rs	0.00%	5 Missing :warning:
sylvia-derive/src/check_generics.rs	0.00%	4 Missing :warning:
sylvia-derive/src/message.rs	60.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## feat/generics_forwarding #283 +/- ## ============================================================ + Coverage 80.94% 80.98% +0.03% ============================================================ Files 28 28 Lines 1958 1993 +35 ============================================================ + Hits 1585 1614 +29 - Misses 373 379 +6 ```

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