Add workflow for publishing package to WinGet repository

[mdanish-kh]

PR creates a GitHub action workflow to trigger on every stable release to publish Claude Code package to WinGet repository. microsoft/winget-create is the tool used for creating and submitting the manifest

• Resolves [FEATURE] Publish to WinGet repository from release CI / CD #17160

Steps needed from maintainers

• Add a repository secret named WINGET_CREATE_GITHUB_TOKEN that's a public access token (classic) with public_repo scope from the user account where the winget-pkgs fork will exist for submitting a PR. Recommend using a bot account for this purpose.

Validation

To validate one can just run the same powershell commands listed in the workflow job, but omit the --submit flag to prevent opening an actual PR.

curl.exe -JLO https://aka.ms/wingetcreate/latest
.\wingetcreate.exe update Anthropic.ClaudeCode `
  --version 10.0.0 `
  --urls https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/2.0.76/win32-x64/claude.exe