NuGet packaging, GitHub Actions CI/CD, and release workflow

[markdav-is]

Summary

Set up NuGet packaging, CI/CD pipeline, and release workflow so the tool can be distributed.

Depends On

• All implementation phases
• Testing Suite

Tasks

• NuGet packaging:
  • Finalize .csproj metadata (authors, description, tags, license, repo URL)
  • dotnet pack -c Release produces valid .nupkg
  • Test local install: dotnet tool install --global --add-source ./nupkg MarkDav.Oqtane.Cli
• GitHub Actions CI:
  • Build on push/PR to main
  • Run dotnet test on Windows, Linux, macOS
  • Pack and upload artifact
• Release workflow:
  • Tag-based release trigger (e.g., v1.0.0)
  • Publish .nupkg to NuGet.org
  • Create GitHub Release with notes
• Versioning:
  • Semantic versioning (1.0.x for Oqtane 10.0.x)
  • Version set in .csproj or via CI

Acceptance Criteria

• dotnet pack produces installable global tool
• CI builds and tests pass on all three platforms
• Tagged releases auto-publish to NuGet.org
• README has install instructions

References

• oqtane-module-cli-specification.md — Distribution
• oqtane-module-cli-specification.md — Compatibility Matrix