fix(readme): update error description terminology for clarity

refactor(readme): remove demo startup instructions for clarity

refactor(readme): reorganize content for clarity

feat(docker): add target server for load testing and update parameters

refactor(readme): update demo section for clarity and improved user guidance

feat(docker): update default load testing parameters and improve README

feat(demo): update demo assets and improve load testing parameters

feat(worker): implement error reasons aggregation and latency metrics

feat(tui): enhance performance metrics display and error tracking

feat(proto): add latency metrics to StatsMsg for enhanced performance tracking

feat(docker): enhance load testing configuration and documentation

chore: update .gitignore to include environment and key files

feat(readme): enhance Japanese and English documentation for clarity and detail

feat(demo): add demo scripts and GIFs for Docker usage

feat(worker): enhance error logging and TLS configuration