fix: make value property work for Layer name in artrule prelude

[bartveneman]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.05%. Comparing base (70f30c2) to head (5f561bb).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #93   +/-   ##
=======================================
  Coverage   95.04%   95.05%           
=======================================
  Files          15       15           
  Lines        2444     2446    +2     
  Branches      630      630           
=======================================
+ Hits         2323     2325    +2     
  Misses        121      121           

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[codecov-commenter]

Bundle Report

Changes will increase total bundle size by 166 bytes (0.13%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
@projectwallace/css-parser-esm	131.85kB	166 bytes (0.13%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: @projectwallace/css-parser-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
parse-*.js	143 bytes	16.15kB	0.89%
css-*.js	23 bytes	16.68kB	0.14%

Files in parse-*.js:

• ./src/parse-atrule-prelude.ts → Total Size: 15.56kB

Files in css-*.js:

• ./src/css-node.ts → Total Size: 15.86kB