feat: impl account activation

[laminne]

close #850

What does this PR do?

• アカウントの有効化を実装
• 適切にメールアドレス検証トークンを削除できるように
• いくつかの部分で Promise.resolveを使わないように

Additional information

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 27 lines in your changes missing coverage. Please review.

Project coverage is 49.76%. Comparing base (45a003e) to head (ac0a77f).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/accounts/adaptor/repository/prisma/prisma.ts	8.33%	11 Missing ⚠️
pkg/accounts/service/verifyToken.ts	41.17%	10 Missing ⚠️
...g/accounts/adaptor/repository/dummy/verifyToken.ts	66.66%	3 Missing ⚠️
pkg/accounts/service/verifyToken.test.ts	57.14%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #851      +/-   ##
==========================================
- Coverage   49.82%   49.76%   -0.06%     
==========================================
  Files         172      172              
  Lines       15855    15888      +33     
  Branches     1246     1246              
==========================================
+ Hits         7899     7906       +7     
- Misses       7956     7982      +26     

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