Summary: Carrd adds new navigation menu and site demos

Why It Matters: The site now makes it easier for visitors to find help and see live examples of what they can build. This helps new users understand the product faster.

What Changed:

• Added a new top navigation menu with links to Sign Up, Documentation, Changelog, and Contact.
• Added a gallery of five live demo sites to show different ways to use the tool.
• Simplified the "Forms" description by listing fewer email providers directly and linking to a full list instead.
• Added a footer with links to Terms, Privacy, and Contact.