feat: password, social sign, verified email import

[aeneasr]

Closes #2151
Closes #605

Related issue(s)

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security. vulnerability, I
  confirm that I got green light (please contact
  [email protected]) from the maintainers to push
  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further Comments

[aeneasr]

ory/docs#617

[codecov]

Codecov Report

Merging #2256 (64ecfc2) into master (6da2370) will decrease coverage by 0.17%.
The diff coverage is 71.31%.

@@            Coverage Diff             @@
##           master    #2256      +/-   ##
==========================================
- Coverage   75.87%   75.69%   -0.18%     
==========================================
  Files         308      310       +2     
  Lines       16117    16189      +72     
==========================================
+ Hits        12229    12255      +26     
- Misses       3011     3048      +37     
- Partials      877      886       +9     

Impacted Files	Coverage Δ
selfservice/strategy/oidc/types.go	80.00% <ø> (-2.15%)	⬇️
selfservice/strategy/password/registration.go	58.90% <0.00%> (-5.89%)	⬇️
selfservice/strategy/password/settings.go	73.13% <33.33%> (-1.52%)	⬇️
selfservice/strategy/oidc/strategy_registration.go	56.48% <50.00%> (ø)
identity/handler_import.go	63.04% <63.04%> (ø)
identity/handler.go	84.68% <70.00%> (-1.59%)	⬇️
selfservice/strategy/link/strategy_recovery.go	63.17% <75.00%> (-0.81%)	⬇️
identity/identity.go	88.67% <81.81%> (-0.51%)	⬇️
identity/credentials_oidc.go	85.00% <85.00%> (ø)
selfservice/strategy/oidc/strategy_settings.go	64.79% <90.00%> (ø)
... and 10 more

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