feat: Support auto size for text with non-start alignment

[marc2332]

Closes #1029

[codecov]

Codecov Report

Attention: Patch coverage is 45.45455% with 6 lines in your changes missing coverage. Please review.

Project coverage is 74.77%. Comparing base (721dbaa) to head (302abd4).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/core/src/render/utils/label.rs	33.33%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1030      +/-   ##
==========================================
- Coverage   74.78%   74.77%   -0.02%     
==========================================
  Files         219      219              
  Lines       25433    25439       +6     
==========================================
+ Hits        19020    19021       +1     
- Misses       6413     6418       +5     

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[marc2332]

todo: tests!