breaking: replace csstree with @projectwallace/css-parser

[bartveneman]

breaking changes:

• layer locations no longer report end

other changes

• TODO: compare install size
• TODO: compare runtime performance
• TODO: compare memory usage

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (f4f8ff6) to head (34041cb).

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #11   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines          220       191   -29     
=========================================
- Hits           220       191   -29     

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[codecov-commenter]

Bundle Report

Changes will increase total bundle size by 17 bytes (0.19%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
cssLayerTree-esm	3.41kB	17 bytes (0.5%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: cssLayerTree-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
css-*.js	17 bytes	3.41kB	0.5%

Files in css-*.js:

• ./src/index.js → Total Size: 3.44kB