feat: こるくの玉音放送縮小版を追加

[m1sk9]

Details of implementation (実施内容)

!gyokuon true で縮小版の玉音放送を再生するフラグを追加しました。

[cloudflare-workers-and-pages]

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Latest commit:	fc0bded
Status:	✅  Deploy successful!
Preview URL:	https://bdd488bb.oreorebot2.pages.dev
Branch Preview URL:	https://feat-gyokuon-short.oreorebot2.pages.dev

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[codecov]

Codecov Report

Merging #936 (fc0bded) into main (a2eee16) will increase coverage by 0.13%.
The diff coverage is 91.30%.

@@            Coverage Diff             @@
##             main     #936      +/-   ##
==========================================
+ Coverage   74.02%   74.16%   +0.13%     
==========================================
  Files          72       72              
  Lines        4897     4915      +18     
  Branches      415      419       +4     
==========================================
+ Hits         3625     3645      +20     
+ Misses        858      852       -6     
- Partials      414      418       +4     

Flag	Coverage Δ
unittests	74.16% <91.30%> (+0.13%)	⬆️

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Files Changed	Coverage Δ
src/service/command/gyokuon.ts	81.81% <91.30%> (+2.80%)	⬆️

... and 1 file with indirect coverage changes

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