fix: highlight search match not scrolling document to reveal said match

[richardshiue]

I think some logic got lost during the transition from v2 to v3

no tests yet, need review

regression on appflowy main repo: entering text into the find text field causes title to get focus if it's empty

[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 2 lines in your changes missing coverage. Please review.

Project coverage is 72.23%. Comparing base (46e00fc) to head (cdf5f26).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...onent/service/scroll/editor_scroll_controller.dart	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #954      +/-   ##
==========================================
+ Coverage   72.08%   72.23%   +0.15%     
==========================================
  Files         318      318              
  Lines       15073    15093      +20     
==========================================
+ Hits        10865    10903      +38     
+ Misses       4208     4190      -18     

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