What's changed

TL;DR: Added AI dev integration guides, improved lifecycle hooks, and fixed multiple assertion and data provider issues.

✨ Improvements

Add AI developer tools integration and internal guidelines
- Introduce copilot-instructions.md for AI-assisted development
- Add AGENTS.md to describe integration patterns for external developer tools
- Define .tasks/ (versioned) and .task/ (ignored) task storage policies

Fix include set_test_title helper in the single-file library
Fix lifecycle hooks capture and report flow
- set_up, tear_down, set_up_before_script, and tear_down_after_script
Fix false negatives in assert_have_been_called_with when using pipes
Fix trailing whitespace loss in the final argument of data_set
Fix unbound variable error in parse_data_provider_args when set -u is enabled
Fix incorrect bashunit::assertion_failed test name on failure
Fix test name interpolation during failure reporting

Full Changelog: 0.24.0...0.25.0