- Remove GitHub Packages publishing from workflow (now using nuget.org only)
- Update redline README with simple nuget.org install command
- All packages now available via: dotnet tool install --global <PackageName>

Add a parallel annotation system that stores annotations externally as
JSON without modifying the source DOCX file. Annotations are validated
against a SHA256 document hash and projected onto HTML during rendering.

Core components:
- ExternalAnnotationSet: extends OpenContractDocExport with document
  binding (documentId, documentHash, timestamps, label definitions)
- ExternalAnnotationManager: hash computation, annotation creation from
  offsets or text search, validation, JSON serialization
- ExternalAnnotationProjector: projects annotations onto HTML as styled
  spans with configurable label modes (Above, Inline, Tooltip, None)

WASM layer:
- AOT-safe JSON deserialization using source-generated JsonContext
- camelCase property naming for JavaScript interop
- JSExport methods: ComputeDocumentHash, CreateExternalAnnotationSet,
  ValidateExternalAnnotations, ConvertDocxToHtmlWithExternalAnnotations,
  SearchTextOffsets

TypeScript/npm:
- Full type definitions for external annotation types
- Wrapper functions matching WASM exports
- Client-side helpers for annotation creation
- Test harness with external annotation API

Testing:
- 21 C# unit tests for core functionality
- 11 Playwright browser tests including visual demo
- Visual demo renders document with annotations and JSON panel

Closes #57

feat(annotations): add external annotation system (Issue #57)

When comparing Word documents where one has legal numbering (w:isLgl)
and the other doesn't, the comparison result was losing the legal
numbering definitions entirely.

Root cause: The result document starts as a copy of source1, and while
styles were copied from source2 via CopyMissingStylesFromOneDocToAnother,
there was no equivalent for numbering definitions.

Fix: Added CopyMissingNumberingFromOneDocToAnother that:
- Copies missing w:abstractNum elements from revised to result
- Copies missing w:num elements with proper abstractNumId remapping
- Handles ID conflicts by assigning new IDs when definitions differ
- Compares by content (not just ID) to detect different definitions

Fixes: dotnet/Open-XML-SDK#1634

…ring merge

- Add null-safe GetIntAttribute helper for robust attribute extraction
- Check for matching abstractNum content across ALL destination elements
  (not just by ID) to avoid duplicate definitions
- Use explicit PutXDocument(toNumberingXDoc) for clarity
- Add null-checks when setting abstractNumId element values
- Improve code comments for maintainability

- Update main README.md:
  - Fix installation instructions (NuGet, not GitHub Packages)
  - Update repository URLs from JSv4/Redlines to JSv4/Docxodus
  - Add format change detection to features
  - Expand HTML converter features (comments, pagination, headers/footers)
  - Add OpenContractExporter to features list
  - Update npm example with new APIs (metadata, format changes)
  - Update test count (~1,100)

- Update npm/README.md:
  - Add new features (move detection, format changes, pagination, etc.)
  - Update RevisionType enum with Moved and FormatChanged
  - Add getDocumentMetadata and exportToOpenContract API docs
  - Add Web Worker API section
  - Add additional React hooks (useAnnotations, useDocumentStructure)
  - Expand ConversionOptions with new properties
  - Fix credits URL

- Update tools READMEs:
  - Add environment variable documentation (DEBUG flags)
  - Remove outdated limitation (headers/footers now supported)
  - Fix license URLs to JSv4/Docxodus

- Fix repository URLs in all .csproj files:
  - Docxodus/Docxodus.csproj
  - tools/redline/redline.csproj
  - tools/docx2html/docx2html.csproj
  - tools/docx2oc/docx2oc.csproj

fix(comparer): preserve legal numbering when comparing documents