[Shogi] Move reward and terminal

[sotetsuk]

#1127

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.26%. Comparing base (a147ffa) to head (9b4d6a0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1276      +/-   ##
==========================================
- Coverage   80.26%   80.26%   -0.01%     
==========================================
  Files          62       62              
  Lines        5878     5888      +10     
==========================================
+ Hits         4718     4726       +8     
- Misses       1160     1162       +2     

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