Introduce generics for types

[AlekSi]

No description provided.

[codecov]

Codecov Report

Merging #287 (ec7569f) into main (441ae1c) will increase coverage by 0.04%.
The diff coverage is 73.68%.

@@            Coverage Diff             @@
##             main     #287      +/-   ##
==========================================
+ Coverage   51.27%   51.32%   +0.04%     
==========================================
  Files         112      114       +2     
  Lines        5394     5399       +5     
==========================================
+ Hits         2766     2771       +5     
  Misses       2216     2216              
  Partials      412      412              

Impacted Files	Coverage Δ
internal/types/types.go	94.11% <ø> (ø)
internal/util/testutil/testutil.go	100.00% <ø> (+17.33%)	⬆️
internal/util/testutil/hexdump.go	20.00% <20.00%> (ø)
internal/util/testutil/pg.go	81.42% <81.42%> (ø)
internal/handlers/msg_create.go	75.47% <100.00%> (+0.47%)	⬆️
internal/types/path.go	100.00% <100.00%> (ø)
internal/util/testutil/dump.go	100.00% <100.00%> (+80.00%)	⬆️
internal/util/testutil/path.go	96.49% <100.00%> (ø)

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