Include a new video-thumbnail.jpg and embed a linked thumbnail in README.md pointing to the demo video. Update AGENTS.md child DOX index to state no child AGENTS.md files are needed and list root-owned files (README.md, LICENSE, banner.jpg, video-thumbnail.jpg, and root-level docs). These changes add the video asset and clarify the repository's documentation indexing.
Introduce AGENTS.md as the DOX root contract documenting the agent-driven docs workflow, rules for reading/updating hierarchical AGENTS.md files, and guidance for maintaining local and parent DOX docs. Update README.md to include a banner, an overview of how DOX works, quick usage instructions, and credits. Add banner.jpg used by the README.
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