Update README with detailed project overview, features, installation, and usage. Add AGENTS.md developer guide, CONTRIBUTING.md guidelines, MIT LICENSE file, and fix CI workflow configuration.
- Migrate PHP TOS to static HTML for better SEO
- Refresh CSS with modern design and performance improvements
- Update HTML structure for semantic markup and accessibility
- Improve metadata and readme documentation
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
