Implement softmax functions

[kitsuyui]

• softmax
• softmaxWithTemperature

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.24%. Comparing base (9976918) to head (11903c9).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #479      +/-   ##
==========================================
+ Coverage   98.17%   98.24%   +0.06%     
==========================================
  Files          20       21       +1     
  Lines         329      341      +12     
  Branches       56       56              
==========================================
+ Hits          323      335      +12     
  Misses          6        6              

Flag	Coverage Δ
unittests	98.24% <100.00%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

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