feat: Frontend infrastructure

[PaulKMueller (PaulKMueller)]

Changes

Introduces the shared infrastructure for static report frontends:

• Adds the Vite/React frontend package and packages its build output with quant-ranger.
• Adds quant-ranger frontend export and GitHub Pages deployment documentation.
• Standardizes updater artifacts passed to aggregators.
• Updates CI, packaging, dependencies, and tests.

[codecov]

Codecov Report

❌ Patch coverage is 86.53846% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.77%. Comparing base (8b47c27) to head (9d75bd1).

Files with missing lines	Patch %	Lines
quant_ranger/_impl/cli/_frontend.py	77.77%	6 Missing ⚠️
quant_ranger/_impl/cli/_update.py	87.50%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main      #24      +/-   ##
===========================================
- Coverage   100.00%   99.77%   -0.23%     
===========================================
  Files           49       50       +1     
  Lines         3077     3124      +47     
===========================================
+ Hits          3077     3117      +40     
- Misses           0        7       +7     

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