feat: support sign up with information provided by OIDC providers

[rot1024]

Support any OIDC provider

• Automatically retrieve user information from userinfo endpoint when signing up
• Supports all JWT sub formats
• Refactor some code to make them mockable

[codecov]

Codecov Report

Merging #130 (0effecf) into main (51178b3) will increase coverage by 0.36%.
The diff coverage is 47.23%.

❗ Current head 0effecf differs from pull request most recent head a375a5d. Consider uploading reports for the commit a375a5d to get more accurate results

@@            Coverage Diff             @@
##             main     #130      +/-   ##
==========================================
+ Coverage   36.25%   36.61%   +0.36%     
==========================================
  Files         326      330       +4     
  Lines       29069    29254     +185     
==========================================
+ Hits        10538    10711     +173     
+ Misses      17576    17546      -30     
- Partials      955      997      +42     

Impacted Files	Coverage Δ
internal/adapter/gql/context.go	0.00% <ø> (ø)
internal/adapter/gql/resolver_mutation_user.go	0.00% <0.00%> (ø)
internal/app/auth_server.go	0.00% <0.00%> (ø)
internal/app/jwt.go	0.00% <0.00%> (ø)
internal/app/web.go	0.00% <0.00%> (ø)
internal/infrastructure/auth0/authenticator.go	44.02% <ø> (-3.93%)	⬇️
internal/infrastructure/mailer/mock.go	0.00% <0.00%> (ø)
internal/infrastructure/memory/auth_request.go	0.00% <0.00%> (ø)
internal/infrastructure/memory/team.go	0.00% <0.00%> (ø)
internal/infrastructure/memory/user.go	0.00% <0.00%> (ø)
... and 12 more