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 85.55%. Comparing base (3ae21f8) to head (ca86724).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5821      +/-   ##
==========================================
- Coverage   85.57%   85.55%   -0.03%     
==========================================
  Files         320      320              
  Lines       31468    31415      -53     
  Branches     8662     8662              
==========================================
- Hits        26929    26876      -53     
  Misses       4108     4108              
  Partials      431      431              

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[mstange]

Seems reasonable, sorry I missed this!