- Add if_ci() to CI utilities
- Add strip_common_prefix() to path utilities
- Add detect_packages_from_files() and find_all_packages_under_path() to module detection
- Add runtime utilities: find_shiv(), ensure_standalone_script_up_to_date(), ensure_zipapp_up_to_date(), runtime_swap()
- Add subprocess utilities: run_with_output(), run_with_separated_output()
- Add create_version_info() to version utilities
- Add testing utilities: create_mock_superclass_test(), patch_everywhere()
- Update Quick Reference table with all new functions
- Update README and index.md features sections

- Add 3 missing tests to test_detect_packages_from_files.py
- Add comprehensive test suite to test_fnmatchcase_portable.py (3 -> 40 tests)
- Add new test_is_running_under_pytest.py with 5 tests

All tests migrated from serger project and converted to match
this package's testing conventions.

- Update pyproject.toml configuration
- Refactor modules.py and testing.py
- Update test_pytest__runtime_mode_swap.py structure
- Update conftest.py configuration

- Rename publish.yml to publish_pypi.yml
- Rename release.yml to release_github.yml

More descriptive names clarify the purpose of each workflow.

- Add pytest-xdist dependency for parallel test execution
- Add parallel test tasks (test:parallel, test:fast, etc.)
- Update check and check:fix tasks to use parallel execution
- Split zipapp tests into separate files with __runtime_mode__ marker
- Remove skip decorators - conftest now filters zipapp tests automatically
- Add comment in pytest.ini explaining parallel execution is opt-in

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

- Remove bin/serger.py (large unused file)
- Rename subprocess.py to subprocess_utils.py for clarity
- Add comprehensive runtime utilities tests
- Update dev scripts (add install_pre_commit_hooks.sh, pyright-quiet.sh; remove list-project.sh, sync_ai_guidance.py)
- Update source modules (runtime, testing, namespace)
- Update test files for consistency
- Update pyproject.toml and dependencies
- Update GitHub workflow and documentation