feat: Add support for generics in interface

[jawoznia]

close #224

[codecov[bot]]

Codecov Report

Merging #231 (f01f822) into feat/generics_support (e6131e4) will increase coverage by 0.52%. The diff coverage is 77.92%.

@@                    Coverage Diff                    @@
##           feat/generics_support     #231      +/-   ##
=========================================================
+ Coverage                  87.72%   88.24%   +0.52%     
=========================================================
  Files                         24       25       +1     
  Lines                       1303     1336      +33     
=========================================================
+ Hits                        1143     1179      +36     
+ Misses                       160      157       -3     

Files Changed	Coverage Δ
sylvia-derive/src/check_generics.rs	94.44% <ø> (+22.22%)	:arrow_up:
sylvia/src/types.rs	80.00% <ø> (ø)
sylvia/tests/generics.rs	0.00% <0.00%> (ø)
sylvia-derive/src/multitest.rs	92.64% <60.00%> (-0.46%)	:arrow_down:
sylvia-derive/src/utils.rs	64.00% <60.00%> (-2.67%)	:arrow_down:
sylvia-derive/src/message.rs	84.82% <76.74%> (+1.31%)	:arrow_up:
sylvia-derive/src/input.rs	94.62% <100.00%> (+0.43%)	:arrow_up:
sylvia/src/into_response.rs	100.00% <100.00%> (ø)

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