update copy for ai search engine indexing

[gabririgo]

• update copy
• add swap shield specs

[Copilot]

Pull request overview

This PR updates site copy and indexing-related artifacts to better position RigoBlock for AI search/agent discovery, including expanded descriptions of agent safety rails (Swap Shield / NAV Shield / Scoped Delegation) and structured data updates.

Changes:

• Expanded/rewrote marketing and technical copy across the homepage, FAQ, project pages, and llms.txt to emphasize “onchain vault agents” and safety mechanisms.
• Added/extended AI crawler allowlist entries in robots.txt.
• Enhanced JSON-LD structured data in _includes/head.html, including FAQPage schema for the FAQ page.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
robots.txt	Adds additional AI/LLM crawler user-agents with Allow rules and keeps sitemap reference.
llms.txt	Updates LLM-facing product summary, key concepts, and adds a comparison table for indexing/agent retrieval.
index.md	Updates homepage headline and adds a “quick answer” paragraph describing the agent-focused positioning.
faq.md	Rewrites/expands FAQ content to include onchain vault agents, Swap Shield, Scoped Delegation, and updated wording.
_project/05_principles.md	Updates principles copy to reflect autonomous agents and updated terminology (settlement/operation modes).
_project/02_protocol.md	Reframes protocol page as an “infrastructure stack” and adds Swap Shield + NAV Shield description.
_project/01_concept.md	Updates concept framing and adds Swap Shield mention alongside NAV Shield and Scoped Delegation.
_includes/head.html	Updates SoftwareApplication JSON-LD fields and adds conditional FAQPage JSON-LD for the FAQ page.
_config.yml	Updates site description/short description and keyword list for AI-agent/search positioning.

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