breaking: replace skip_comments option with on_comment

[bartveneman]

Replaces skip_comments with on_comment which behaves very much like CSSTree's onComment except that it contains more information.

The `CommentInfo` object passed to `on_comment` contains:
  - `start: number` - Starting offset in source (0-based)
  - `end: number` - Ending offset in source (0-based)
  - `length: number` - Length of the comment
  - `line: number` - Starting line number (1-based)
  - `column: number` - Starting column number (1-based)

Another breaking change is that comments are not created as tokens anymore. The whole token stream only contains non-comment tokens which saves time during parsing.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 95.12195% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.92%. Comparing base (dcc949c) to head (26e382c).

Files with missing lines	Patch %	Lines
src/tokenize.ts	89.47%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #127      +/-   ##
==========================================
- Coverage   94.95%   94.92%   -0.03%     
==========================================
  Files          16       16              
  Lines        2614     2601      -13     
  Branches      681      672       -9     
==========================================
- Hits         2482     2469      -13     
  Misses        132      132              

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[codecov-commenter]

Bundle Report

Changes will decrease total bundle size by 257 bytes (-0.18%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
@projectwallace/css-parser-esm	141.49kB	-257 bytes (-0.18%) ⬇️

Affected Assets, Files, and Routes:

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

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
parse-*.js	-7 bytes	8.38kB	-0.08%
parse-*.js	-7 bytes	22.54kB	-0.03%
parse-*.js	-7 bytes	6.92kB	-0.1%
parse-*.js	-6 bytes	8.59kB	-0.07%
parse-*.js	27 bytes	25.92kB	0.1%
tokenize.js	-207 bytes	15.9kB	-1.29%
parse.js	-50 bytes	13.11kB	-0.38%

Files in parse-*.js:

• ./src/parse-value.ts → Total Size: 7.79kB

Files in parse-*.js:

• ./src/parse-atrule-prelude.ts → Total Size: 21.75kB

Files in parse-*.js:

• ./src/parse-declaration.ts → Total Size: 6.28kB

Files in parse-*.js:

• ./src/parse-anplusb.ts → Total Size: 8.17kB

Files in parse-*.js:

• ./src/parse-selector.ts → Total Size: 24.49kB

Files in tokenize.js:

• ./src/tokenize.ts → Total Size: 15.31kB

Files in parse.js:

• ./src/parse.ts → Total Size: 12.25kB