Add public demo deployment

[federicoramos67]

Goal

Deploy ContextForge publicly so visitors can try it without cloning the repository.

Suggested platforms

• Vercel
• Netlify
• GitHub Pages

Acceptance criteria

• Public live demo URL available.
• README includes a clear Live Demo link.
• Build works in CI before deployment.
• No backend or secrets required.

Notes

This is one of the highest-impact improvements for portfolio value.