Add basic display list + String support

[Kyle-Ye]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 70.27027% with 22 lines in your changes missing coverage. Please review.

Project coverage is 21.94%. Comparing base (fc6ad55) to head (a60d71f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...UICore/Render/DisplayList/DisplayList+String.swift	66.66%	19 Missing ⚠️
...enSwiftUICore/Render/DisplayList/DisplayList.swift	82.35%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #146      +/-   ##
==========================================
+ Coverage   21.17%   21.94%   +0.76%     
==========================================
  Files         231      232       +1     
  Lines        7286     7355      +69     
==========================================
+ Hits         1543     1614      +71     
+ Misses       5743     5741       -2     

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