v0.1.3

feat: copy workspace files to test-named subdirectory (#39)

* feat: copy workspace files to test-named subdirectory

Place copied files under {skill}_{test}_{timestamp}/ to avoid
overwriting when multiple tests copy files with the same name.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* test: add test for copy_to_output with subdirectory

Verify that files are copied to the correct subdirectory path
when copy_to_output is enabled.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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Co-authored-by: Claude <claude@anthropic.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>