perf: Replace if-else chain with switch-based token dispatch

[bartveneman]

closes #98

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.09%. Comparing base (6e95525) to head (d88b845).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #103   +/-   ##
=======================================
  Coverage   95.09%   95.09%           
=======================================
  Files          15       15           
  Lines        2567     2568    +1     
  Branches      665      665           
=======================================
+ Hits         2441     2442    +1     
  Misses        126      126           

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[codecov-commenter]

Bundle Report

Changes will decrease total bundle size by 48 bytes (-0.03%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
@projectwallace/css-parser-esm	138.71kB	-48 bytes (-0.03%) ⬇️

Affected Assets, Files, and Routes:

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

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
tokenize.js	-48 bytes	15.3kB	-0.31%

Files in tokenize.js:

• ./src/tokenize.ts → Total Size: 14.74kB