Summary: Tana adds local API and MCP support

Why It Matters: Tana is now letting external AI tools like Claude read and write directly to a user's private notes. This makes the product a "brain" for other AI agents rather than just a place to store text.

What Changed:

• Added a new section for "Tana API and MCP" to the homepage.
• Introduced support for Model Context Protocol (MCP) to connect with tools like Claude Code.
• Added a "Core features" section that highlights the Outline editor, Supertags, and Live searches.
• Reorganized the page layout to move core feature descriptions higher up.