feat: adjust display of theme palette in styleguide

[dsmmcken]

Note: contains no color or app changes.

• display styleguide as theme palette in a grid (shows in e2e)
• re-order blue to be after cyan in code
• group content-subdued-bg with content-bg (triggers a e2e change)

[codecov]

Codecov Report

Attention: 18 lines in your changes are missing coverage. Please review.

Comparison is base (6547814) 46.05% compared to head (bdc11e7) 46.03%.
Report is 2 commits behind head on main.

Files	Patch %	Lines
...ackages/code-studio/src/styleguide/ThemeColors.tsx	18.18%	18 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1745      +/-   ##
==========================================
- Coverage   46.05%   46.03%   -0.02%     
==========================================
  Files         621      621              
  Lines       37433    37465      +32     
  Branches     9400     9419      +19     
==========================================
+ Hits        17238    17247       +9     
- Misses      20141    20164      +23     
  Partials       54       54              

Flag	Coverage Δ
unit	46.03% <18.18%> (-0.02%)	⬇️

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[bmingles]

LGTM. I looked at styleguide and new color layout looks good. Looked at DH very high level. Looks as before as expected.