fix: many fixes and extractor improvements

[DylanPiercey]

Refactor the main extractor logic which allows for many simplifications and fixes.
This PR also contains a small bug bash.

See changesets for more details.

[changeset-bot]

🦋 Changeset detected

Latest commit: 96225b7

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

This PR includes changesets to release 2 packages

Name	Type
@marko/language-tools	Patch
@marko/language-server	Patch

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[coderabbitai]

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Review failed

Pull request was closed or merged during review

Walkthrough

This PR refactors the extractor token model to introduce a Mapping enum distinguishing full, alias, and anchor mappings, and adds Extractor.anchor for zero-length source-anchored tokens. attach-scopes.ts gains a range field on VarBinding, a new ProgramBinding export, an analyzeMutations flag, and fixes for mutation tracking in for-loops, destructuring assignments, and function declarations. The script extractor replaces all tag-name comment injections with anchor() calls, updates hoist binding iteration to use binding objects, and introduces #hasScopeExpression/#writeScopeExpression helpers. The language server adds findReferences and findDocumentHighlights handlers, updates findDefinition to return multiple links via sourceRangesAt, and rewrites doRename to accumulate edits across all generated offsets. Test fixtures for tag-variable mutation patterns and seven changeset entries are included.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 9.52% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'fix: many fixes and extractor improvements' accurately reflects the main objective of the PR, which is to refactor extractor logic and include multiple bug fixes.
Description check	✅ Passed	The description relates to the changeset by explaining the refactoring of extractor logic and mentioning a bug bash, directing readers to changesets for more details.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch extractor-refactor

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