feat: remove next-sitemap and use the native Next.js sitemap/robots.txt

[ixartz]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 5.55%. Comparing base (9aa1727) to head (8c2e668).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/utils/Helpers.ts	0.00%	4 Missing and 2 partials ⚠️
src/app/robots.ts	0.00%	3 Missing ⚠️
src/app/sitemap.ts	0.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main    #265      +/-   ##
========================================
- Coverage   5.78%   5.55%   -0.23%     
========================================
  Files         33      36       +3     
  Lines        294     306      +12     
  Branches      21      23       +2     
========================================
  Hits          17      17              
- Misses       269     279      +10     
- Partials       8      10       +2     

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[github-actions]

🎉 This PR is included in version 3.45.0 🎉

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