feat: implement metrics

[imos]

Dataにシャープレシオの計算等を実装しました。

[codecov-commenter]

Codecov Report

❌ Patch coverage is 91.17647% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.88%. Comparing base (11faffb) to head (2cfe149).

Files with missing lines	Patch %	Lines
qfeval_data/data.py	91.17%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master       #7      +/-   ##
==========================================
+ Coverage   71.69%   72.88%   +1.19%     
==========================================
  Files           6        6              
  Lines        1127     1195      +68     
==========================================
+ Hits          808      871      +63     
- Misses        319      324       +5     

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[imos]

@ro1205 レビューお願いします。