enhance(frontend): 共有と埋込みコード生成を親子メニューにまとめる

[kakkokari-gtyih]

What

ログイン中のノートメニューでは、ブラウザの共有ボタンと埋め込みコード生成ボタンを親メニュー内にまとめるように

Why

ノートメニューが縦に長くなってきているので整理したい（コピー系もまとめることを考えたけど使用頻度が高そうなので除外した）

Additional info (optional)

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 44 lines in your changes missing coverage. Please review.

Project coverage is 19.42%. Comparing base (fa06c59) to head (5444ce7).

Files with missing lines	Patch %	Lines
packages/frontend/src/scripts/get-note-menu.ts	0.00%	43 Missing ⚠️
packages/frontend/src/scripts/get-appear-note.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop   #14702       +/-   ##
============================================
- Coverage    39.67%   19.42%   -20.26%     
============================================
  Files         1548      719      -829     
  Lines       194496   102083    -92413     
  Branches      2566      990     -1576     
============================================
- Hits         77174    19827    -57347     
+ Misses      116756    81707    -35049     
+ Partials       566      549       -17     

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