Summary: Runware adds Wan 2.6 Flash and search to docs

Why It Matters: The competitor is expanding its model library with newer, faster video generation tools and making it easier for developers to find technical information.

What Changed:

• Added a search bar with a "Ctrl+K" shortcut to the documentation section.
• Updated the featured models list to include Wan 2.6 Flash and MiniMax Hailuo 2.3.
• Changed the "Sign Up" link destination from a subdomain to the main domain.
• Minor text updates to the "Stats" section and navigation labels.