feat: export package.json

[DylanPiercey]

Adds ./package.json to the exports map, so tools can read which parser version they run on with require("htmljs-parser/package.json") instead of getting ERR_PACKAGE_PATH_NOT_EXPORTED.

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Latest commit: 59da534

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
htmljs-parser	Minor

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Reviewing files that changed from the base of the PR and between 228b30f and 59da534.

📒 Files selected for processing (3)

• .changeset/export-package-json.md
• agent-feedback/items/2026-08-20-expose-package-json-export.md
• package.json

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.89%. Comparing base (228b30f) to head (59da534).

Additional details and impacted files

@@                                     Coverage Diff                                     @@
##           dpiercey-ws-marko-invariants-jcdpv7-parserfixes-lookbehind     #256   +/-   ##
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  Coverage                                                       99.89%   99.89%           
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  Files                                                              35       35           
  Lines                                                            4711     4711           
  Branches                                                          912      912           
===========================================================================================
  Hits                                                             4706     4706           
  Misses                                                              4        4           
  Partials                                                            1        1           

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