v1.13.0

Added

• validate --check-repo-access — verifies GITHUB_TOKEN can read each repo: slug (including nested pipeline_file bundles).
• GitHub App setup tutorial — docs/tutorials/github-app-setup.md.
• examples/pr-bot/ — portable PR validation comment workflow (checks out pipeline-compose at a release tag).

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Full Changelog: v1.12.0...v1.13.0