fix: use jump to when cursor not rendered

[richardshiue]

cases to consider that I don't know the best solution to:

• whether to replace existing logic with the new one and not check for the cursor rect
• when using shrinkWrap, the ItemScrollableController isn't available

[codecov]

Codecov Report

Attention: Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 72.00%. Comparing base (c68e5f6) to head (b8ad378).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
...ditor_component/service/scroll_service_widget.dart	42.85%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1015      +/-   ##
==========================================
- Coverage   72.16%   72.00%   -0.17%     
==========================================
  Files         319      319              
  Lines       15246    15339      +93     
==========================================
+ Hits        11003    11045      +42     
- Misses       4243     4294      +51     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.