mcp-check v0.5.0

Open-source scanner polish release inspired by mature security tools like Trivy, Gitleaks, Semgrep, Checkov, TruffleHog, and actionlint.

Highlights:

• Added mcp-check rules and mcp-check rules --format json
• Added mcp-check --version
• Added Marketplace-ready Action branding
• Added docs for rules, configuration, and GitHub Action usage
• Added CHANGELOG, SUPPORT, CODE_OF_CONDUCT, PR template, issue config, and Dependabot
• Preserved capability summaries across multi-preset scans
• Centralized report version output on the package version

Validation:

• 15 tests passing
• CLI version and rules smoke checks passed
• Package build succeeds
• GitHub workflow/action YAML validation succeeds