feat: add Windows x64 (MSVC) platform support

[br-to]

Summary

Adds x86_64-pc-windows-msvc target across the entire build and distribution pipeline so that npm install @open-wallet-standard/core works on Windows x64 without the Cannot find module '@open-wallet-standard/core-win32-x64-msvc' error.

Currently the optionalDependencies in package.json and the CI build matrix only include macOS and Linux targets. Windows users hit a hard failure at runtime because the platform-specific npm package (core-win32-x64-msvc) is never built or published.

Changes

• bindings/node/npm/win32-x64-msvc/package.json — new platform package for Windows x64 (mirrors existing darwin/linux packages)
• bindings/node/package.json — add x86_64-pc-windows-msvc to napi triples and @open-wallet-standard/core-win32-x64-msvc to optionalDependencies
• bindings/node/bin/ows — add win32-x64 entry to PLATFORM_MAP (resolves to ows.exe)
• .github/workflows/release.yml — add windows-latest to build matrix for:
  • CLI binary build (build job)
  • Node.js native addon build (node-addons job)
  • Python wheel build (python-wheels job)
  • CLI binary copy into npm platform package (publish-npm job)
  • Windows-specific handling for .exe extension in rename/upload steps
  • shell: bash for set-version.sh on Windows runners

Platform matrix (after this PR)

Platform	npm package	Rust target	Build OS
macOS ARM	core-darwin-arm64	aarch64-apple-darwin	macos-latest
macOS x64	core-darwin-x64	x86_64-apple-darwin	macos-latest
Linux x64	core-linux-x64-gnu	x86_64-unknown-linux-gnu	ubuntu-latest
Linux ARM	core-linux-arm64-gnu	aarch64-unknown-linux-gnu	ubuntu-latest
Windows x64	core-win32-x64-msvc	x86_64-pc-windows-msvc	windows-latest

Closes #136

Test plan

• CI builds pass on windows-latest for all three jobs (build, node-addons, python-wheels)
• npx napi build --platform --release --target x86_64-pc-windows-msvc produces ows-node.win32-x64-msvc.node
• cargo build --release --target x86_64-pc-windows-msvc produces ows.exe in ows/ workspace
• npm install @open-wallet-standard/core on Windows x64 resolves core-win32-x64-msvc without errors
• ows CLI launches correctly on Windows via the Node.js bin wrapper

🤖 Generated with Claude Code

---

Note

Medium Risk
Medium risk due to changes across the release workflow matrices and artifact naming/packaging, which could break cross-platform builds or publishing if Windows-specific paths/shell behavior differs.

Overview
Adds Windows x64 (MSVC) support across the release pipeline so binaries and language bindings are built and published for x86_64-pc-windows-msvc.

Updates .github/workflows/release.yml to include Windows runners in the CLI, Node addon, and Python wheel matrices, with Windows-specific .exe renaming/upload and shell: bash where set-version.sh is invoked.

Extends the Node distribution to ship a Windows platform package: adds @open-wallet-standard/core-win32-x64-msvc (new npm/win32-x64-msvc/package.json), wires it into bindings/node/package.json (napi triples + optionalDependencies), updates the bindings/node/bin/ows wrapper to resolve win32-x64 to ows.exe, and copies the Windows CLI binary into the Windows npm package during publish.

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Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​@​open-wallet-standard/​core-win32-x64-msvc@​1.3.2

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[natsukingly]

I'm running into the same issue.
it would be a big help if you could merge this.
@njdawn

[br-to]

Hi @njdawn, would you mind taking a look at this PR when you have a chance? Happy to address any feedback!

[kilkelly]

Would love if this was merged also as finding it hard to develop on Windows currently. Windows platform support would increase developer adoption.