docs: add note user.scrollTo in favour of fireEvent.scroll and edit broken links

[vanGalilea]

Summary

• Clarify that the User Event API is more reliable than the Fire Event API as its more suitable for RN env simulation.
• Fix broken links to code base

Test plan

• review changed content
• double check that the links now work

relates to #1549

Future improvements

• support scroll to the bottom of a VirtualizedList

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (21254b0) 95.40% compared to head (068be8f) 95.51%.
Report is 1 commits behind head on main.

❗ Current head 068be8f differs from pull request most recent head 5ee74aa. Consider uploading reports for the commit 5ee74aa to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1551      +/-   ##
==========================================
+ Coverage   95.40%   95.51%   +0.11%     
==========================================
  Files          99       99              
  Lines        5400     5400              
  Branches      858      857       -1     
==========================================
+ Hits         5152     5158       +6     
+ Misses        248      242       -6     

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[pierrezimmermannbam]

Thank you for the contribution @vanGalilea! I appreciate you're taking some time to improve the docs and also fix broken links! You'll need an approve from another maintainer before this gets merged though