Summary: Opal adds no-code AI app building

Why It Matters: This change makes it easier for more people to build AI apps.

What Changed:

• The main headline changed from "Build, edit and share mini-AI apps using natural language" to "Build, edit, and share AI mini-apps using natural language".
• New sections were added about starting from scratch, exploring a gallery, and unleashing creativity.
• New features were added: No-Code Creation, Rapid Prototyping, and Intuitive Visual Editing.
• The "How to build an app" section was removed.
• The Google footer links were removed.
• The Discord link changed from "Stay connected" to "Join our Discord for support and sharing feedback".
• The "Mini-apps anyone can build. Sign in to view or make your own." text was removed.