feat: アカウントのヘッダー/アバター画像の設定、設定解除ができるように

[laminne]

close #809

What does this PR do?

• ヘッダーとアバター画像の設定、設定解除ができるように
• アカウント取得時にヘッダー・アバター画像を(あれば)返すように
• マイグレーションの追加(AccountHeader/AccountAvatar モデル)
• MediaModuleFacadeの定義と実装
• Service実装とDIシンボルの定義
• APIの実装
• Accountモジュール内の/repository/dummyのファイルを分割

Additional information

[codecov]

Codecov Report

Attention: Patch coverage is 45.12195% with 765 lines in your changes missing coverage. Please review.

Project coverage is 48.98%. Comparing base (aa8a99a) to head (e315857).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/accounts/router.ts	0.00%	254 Missing ⚠️
pkg/accounts/mod.ts	0.00%	124 Missing ⚠️
pkg/accounts/adaptor/controller/account.ts	0.00%	122 Missing ⚠️
pkg/accounts/adaptor/repository/prisma/avatar.ts	0.00%	70 Missing ⚠️
pkg/accounts/adaptor/repository/prisma/header.ts	0.00%	70 Missing ⚠️
...counts/adaptor/repository/dummy/inactiveAccount.ts	0.00%	33 Missing ⚠️
pkg/accounts/adaptor/repository/dummy/follow.ts	61.76%	26 Missing ⚠️
pkg/accounts/adaptor/repository/dummy/avatar.ts	72.88%	16 Missing ⚠️
pkg/accounts/adaptor/repository/dummy/header.ts	72.88%	16 Missing ⚠️
pkg/accounts/service/avatar.ts	91.42%	9 Missing ⚠️
... and 5 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #823      +/-   ##
==========================================
- Coverage   49.40%   48.98%   -0.42%     
==========================================
  Files         149      161      +12     
  Lines       13771    14922    +1151     
  Branches     1077     1167      +90     
==========================================
+ Hits         6803     7310     +507     
- Misses       6968     7612     +644     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.