fix: StyleSheet sort makes plugin doesn't work as expected (#666)

[avxit]

This should fix #666. The solution is create an additional StyleSheet for plugin, separate sort for each StyleSheet then extend.

[codecov-commenter]

Codecov Report

Merging #669 (1bba0c7) into main (dec4a6a) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #669   +/-   ##
=======================================
  Coverage   88.18%   88.19%           
=======================================
  Files          57       57           
  Lines        4868     4869    +1     
  Branches     1037     1037           
=======================================
+ Hits         4293     4294    +1     
  Misses        311      311           
  Partials      264      264           

Impacted Files	Coverage Δ
src/lib/preflight.ts	89.18% <100.00%> (+0.30%)	⬆️

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