Feat(auth): Signin documentation with OpenApi

[codecov[bot]]

Codecov Report

Merging #36 (8ad5ad0) into master (0e38f43) will increase coverage by 7.40%. The diff coverage is 65.38%.

@@            Coverage Diff             @@
##           master      #36      +/-   ##
==========================================
+ Coverage   63.90%   71.31%   +7.40%     
==========================================
  Files          22       59      +37     
  Lines         169      624     +455     
  Branches       13       79      +66     
==========================================
+ Hits          108      445     +337     
- Misses         58      154      +96     
- Partials        3       25      +22     

Impacted Files	Coverage Δ
src/auth/dto/admin-registration.dto.ts	0.00% <0.00%> (ø)
src/auth/dto/buffet-worker-registration.dto.ts	0.00% <0.00%> (ø)
src/token/token-type.enum.ts	100.00% <ø> (+100.00%)	:arrow_up:
src/user/user.service.ts	21.05% <18.91%> (-78.95%)	:arrow_down:
src/auth/decorator/is-valid-name.decorator.ts	20.00% <20.00%> (ø)
src/auth/google-auth.service.ts	20.51% <20.51%> (ø)
src/auth/auth.service.ts	23.33% <23.33%> (ø)
...ion/decorator/contains-capital-letter.decorator.ts	23.52% <23.52%> (ø)
...n/decorator/contains-lowercase-letter.decorator.ts	23.52% <23.52%> (ø)
.../validation/decorator/contains-number.decorator.ts	23.52% <23.52%> (ø)
... and 54 more

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