feat-nvms-container-runtime-adapter

[KooshaPari]

Summary

• Route the existing NVMS container-manager API through an explicit runtime adapter.
• Default to Podman; support WSL Containers (wslc) and Apple Containers (container).
• Reject Docker selectors explicitly and render neutral Containerfile/byteport-container.ps1 artifacts without Docker CLI commands.
• Preserve DockerManager as a source-compatible alias while making the backend boundary explicit.

Validation

• gofmt and git diff --check pass.
• Added focused tests for default selection, Docker rejection, adapter rendering, and neutral build artifacts.
• go test ./lib is currently blocked before package tests by the external dependency github.com/fermyon/spin/sdk/go/v2/http@v2.2.0: internals.go:16 has an export-comment mismatch (spin_http_handle_http_request, want handle_http_request).
• No container runtime was invoked by this change.

Scope

This PR is intentionally separate from BytePort PR #333 and covers only the no-Docker NVMS adapter boundary.

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud