[command] Respect raw output when rendering DevTools banner

[coisa]

Related Issue

Closes #277

Motivation / Context

• Keep the top-level DevTools banner behavior consistent for raw changelog flows used by automations.
• Avoid breaking plain-text consumers of changelog:show and changelog:next-version output.

Changes

• Centralized logo rendering in DevTools::shouldRenderLogo().
• Added explicit raw-command suppression for changelog:show and changelog:next-version.
• Kept suppression behavior for --no-logo, --json, and --pretty-json.
• Added focused DevToolsTest coverage for raw changelog commands.
• Adjusted CHANGELOG.md ordering in Unreleased section.

Verification

• tests/Console/DevToolsTest.php focused scenario added.
• composer dev-tools (environment missing composer)

Documentation / Generated Output

• README updated
• docs/ updated
• Generated or synchronized output reviewed

Changelog

• Added a notable CHANGELOG.md entry

Reviewer Notes

• Command output for changelog:show and changelog:next-version is now banner-free in raw flows.

[github-actions]

🚀 Preview is available for this pull request.

• Docs: https://php-fast-forward.github.io/dev-tools/previews/pr-280/
• Coverage: https://php-fast-forward.github.io/dev-tools/previews/pr-280/coverage/
• Metrics: https://php-fast-forward.github.io/dev-tools/previews/pr-280/metrics/