feat(ai-copilot): refactor AI Copilot settings

[TheoGrandin74]

Summary

PR adding the AI Copilot settings page

[RemiBonnet]

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[codecov]

Codecov Report

❌ Patch coverage is 20.00000% with 8 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (new-navigation@eea7047). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...rc/lib/ai-copilot-settings/ai-copilot-settings.tsx	0.00%	7 Missing ⚠️
...configuration/section-ai-copilot-configuration.tsx	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##             new-navigation    #2403   +/-   ##
=================================================
  Coverage                  ?   35.44%           
=================================================
  Files                     ?       35           
  Lines                     ?      917           
  Branches                  ?      214           
=================================================
  Hits                      ?      325           
  Misses                    ?      575           
  Partials                  ?       17           

Flag	Coverage Δ
unittests	35.44% <20.00%> (?)

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