Directly use photon-colors

[arai-a]

Fixed #5820

This removes a cached copy of photon colors inside the colors.ts, and let it directly use the photon-colors module.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.54%. Comparing base (0693702) to head (0c56b8e).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5821      +/-   ##
==========================================
- Coverage   85.57%   85.54%   -0.03%     
==========================================
  Files         320      320              
  Lines       31448    31395      -53     
  Branches     8570     8666      +96     
==========================================
- Hits        26911    26858      -53     
  Misses       4106     4106              
  Partials      431      431              

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