Add public demo pack for Uxarion

[rachidlaad]

Summary

Adds a docs-based public demo pack so Uxarion can be shown clearly to strangers instead of staying as a technical repo.

Included:

• product gap review with the most important missing proof assets
• 90-second crAPI demo script
• 5-7 minute technical deep-dive demo script
• social launch pack for X, LinkedIn, Hacker News, Reddit, and DMs
• demo assets checklist
• docs index for the demo pack

Why

The repo already has a real security-agent direction, demo claim, install path, evidence/finding/report concepts, ZAP integration, and safety scope logic. The missing piece is public packaging: reproducible proof, short demo, sample output, and distribution copy.

Safety note

All demo guidance is framed around authorized targets, local labs, owned apps, internal testing, or legal bug bounty scope. No public-target testing instructions are included.

Next after this PR

• Add sanitized sample crAPI report artifacts
• Add a README proof table near the top
• Record the 90-second crAPI demo
• Post the demo and collect installation feedback