feat: add version command and improve --version output

[Copilot]

Ports the same feature from score-compose#467 to score-k8s.

Description

Improves version output and adds a new version subcommand with Score logo and update check.

--version output — before:

score-k8s 0.1.0 (build: 2026-01-01T18:28:02Z, sha: abc123-dirty)

--version output — after:

score-k8s 0.1.0 (go1.26.2 - linux/amd64)
git commit: abc123
build date: 2026-01-01T18:28:02Z

New score-k8s version command:

                   ...    .............
               .......   .............
           .........     ............
       .........        .....
      .......           ....   ..
       ..........      .....   ......
           ........   ......   ..........
              .....   .....       ..........
                      ....          ........
              ...........       .........
           ..............    .........
         ................   ......
         ...............    ..
          ............

score-k8s 0.1.0 (go1.26.2 - linux/amd64)
git commit: abc123
build date: 2026-01-01T18:28:02Z

A newer version is available: v0.2.0
Update at: https://github.com/score-spec/score-k8s/releases/tag/v0.2.0

What does this PR do?

• internal/version/version.go: Replaces debug.ReadBuildInfo() with injected GitCommit/BuildDate ldflags + runtime.GOOS/runtime.GOARCH. Fixes -dirty suffix issue and broken version info in container images.
• internal/command/version.go (new): version subcommand with Score logo (--no-logo), version string, and GitHub releases update check (--no-updates-check).
• internal/command/root.go: Exports ScoreImplementationName = "score-k8s" for reuse; updates version template.
• .goreleaser.yaml: Injects GitCommit/BuildDate at release build time.
• Dockerfile: Adds GIT_COMMIT/BUILD_DATE build args and passes them as ldflags.
• .github/workflows/release.yaml: Passes github.sha and github.event.head_commit.timestamp as GIT_COMMIT/BUILD_DATE build-args.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• New chore (expected functionality to be implemented)

Checklist:

• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• I've signed off with an email address that matches the commit author.

[github-actions]

Overview

Image reference	score-k8s:latest	score-k8s:latest
- digest	70755a5b596e	16537aa16552
- tag	latest	latest
- provenance	3c8f3a5	a6ba66b
- vulnerabilities
- platform	linux/amd64	linux/amd64
- size	8.2 MB	8.2 MB (-2.7 kB)
- packages	64	64

Policies (0 improved, 0 worsened)

Policy Name	score-k8s:latest	score-k8s:latest	Change	Standing
Default non-root user	✅	✅		No Change
No AGPL v3 licenses	✅	✅		No Change
No fixable critical or high vulnerabilities	✅	✅		No Change
No high-profile vulnerabilities	✅	✅		No Change
No outdated base images	✅	✅		No Change
No unapproved base images	✅	✅		No Change
Supply chain attestations	✅	✅		No Change
Valid Docker Hardened Image (DHI) or DHI base image	⚠️ 2	⚠️ 2		No Change

Packages and Vulnerabilities (1 package changes and 0 vulnerability changes)

• ♾️ 1 packages changed
• 63 packages unchanged

Changes for packages of type golang (1 changes)

	Package	Version score-k8s:latest	Version score-k8s:latest
♾️	github.com/score-spec/score-k8s	0.0.0-20260415141349-3c8f3a536dbf+dirty	0.0.0-20260416012532-a6ba66b29c4d+dirty

[mathieu-benoit]

LGTM

[mathieu-benoit]

Now included in this release https://github.com/score-spec/score-k8s/releases/tag/0.11.0.

docker run --rm -it scorespec/score-k8s:0.11.0 version:

                   ...    .............
               .......   .............
           .........     ............
       .........        .....
      .......           ....   ..
       ..........      .....   ......
           ........   ......   ..........
              .....   .....       ..........
                      ....          ........
              ...........       .........
           ..............    .........
         ................   ......
         ...............    ..
          ............

score-k8s 0.11.0 (go1.26.2 - linux/amd64)
git commit: 68df589ac4b6a53629169fded6279e00c15f602c
build date: 2026-04-15T21:53:40-04:00

[mathieu-benoit]

FYI: associated docs now updated score-spec/docs#277