Summary: v0 adds Refactor Preview and File Explorer tools

Why It Matters: The tool is moving from a simple chat interface to a full code editor experience. This helps developers manage complex projects and edit specific files more easily.

What Changed:

• Added a File Explorer sidebar to view and organize project files.
• Added a "Find in Files" search feature with a keyboard shortcut (⇧⌘F).
• Added a Refactor Preview section to track code changes.
• Updated the template gallery with new featured items like "Vertical Nav Sections" and "Artist Portfolio."
• Updated usage stats for existing templates, showing increased community engagement.