feat(api): [write | emailConfirmation] rest API endpoint for ApproveEmailConfirmation (#287)

[KrystianKjjk]

Closes #287

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[codecov-commenter]

Codecov Report

Merging #367 (bd0bce9) into main (d9478f2) will increase coverage by 0.39%.
The diff coverage is 97.26%.

@@            Coverage Diff             @@
##             main     #367      +/-   ##
==========================================
+ Coverage   87.86%   88.25%   +0.39%     
==========================================
  Files         130      138       +8     
  Lines        1491     1558      +67     
  Branches      195      204       +9     
==========================================
+ Hits         1310     1375      +65     
- Misses        181      183       +2     

Flag	Coverage Δ
api	86.06% <97.26%> (+0.59%)	⬆️
ui	98.87% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...-registration-was-started.event-handler.service.ts	100.00% <ø> (ø)
...ntation/rest/email-confirmation.rest-controller.ts	83.33% <80.00%> (-4.17%)	⬇️
packages/api/src/app.module.ts	100.00% <100.00%> (ø)
...confirmation-was-approved-event-handler.service.ts	100.00% <100.00%> (ø)
...en-complete-user-registration-automation.module.ts	100.00% <100.00%> (ø)
...ved-then-complete-user-registration.test-module.ts	100.00% <100.00%> (ø)
...en-request-email-confirmation-automation.module.ts	100.00% <100.00%> (ø)
...dule/shared/commands/complete-user-registration.ts	100.00% <100.00%> (ø)
...ts/user-registration-was-completed.domain-event.ts	100.00% <100.00%> (ø)
...ents/user-registration-was-started.domain-event.ts	100.00% <100.00%> (ø)
... and 13 more

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[MateuszNaKodach]

Implementation looks really great!
Let's add some tests and REST API docs for that :)