feat: add raw content token & node

[yeonjuan]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces support for raw content tokens and nodes, allowing the parser to handle content that should be preserved without additional processing or interpretation. This is useful for custom tags that contain raw markup like Markdown or code blocks.

• Adds RawContent token and node types to distinguish from regular text content
• Updates tokenizer to emit RawContent tokens instead of Text tokens for custom tag content
• Implements tree construction handling for raw content nodes

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/constants/token-types.ts	Adds RawContent token type enum
src/constants/node-types.ts	Adds RawContent node type enum
src/types/token.ts	Updates AnyToken union to include RawContent composite token
src/types/node.ts	Adds RawContentNode type and updates node children arrays
src/tokenizer/handlers/custom-tag-raw-content.ts	Changes tokenizer to emit RawContent instead of Text tokens
src/tree-constructor/handlers/tag-content.ts	Adds handler for RawContent tokens in tree construction
src/tokenizer/tests/output/custom-tag-raw-content.ts	Updates test output to reflect RawContent token type
src/tree-constructor/tests/construct-tree.spec.ts	Adds test case for custom tag raw content
src/tree-constructor/tests/file_snapshots/construct-tree-Custom-Tag-Raw-Content-0.json	Snapshot file for raw content test case
src/index.ts	Exports Options type from parse types

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.08%. Comparing base (ab87f37) to head (014baf9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #33      +/-   ##
==========================================
+ Coverage   95.05%   95.08%   +0.03%     
==========================================
  Files          57       57              
  Lines        1172     1180       +8     
  Branches      172      173       +1     
==========================================
+ Hits         1114     1122       +8     
  Misses         58       58              

Flag	Coverage Δ
unittest	95.08% <100.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/tokenizer/handlers/custom-tag-raw-content.ts	100.00% <ø> (ø)
src/tree-constructor/handlers/tag-content.ts	94.73% <100.00%> (+0.61%)	⬆️

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