Add Video Section to Landing Page

Added a new section to the landing page that embeds a simulation video demonstrating the Leios protocol in action.

Changes

• Added VideoSection component to index.tsx
• Added corresponding styles in index.module.css
• Video is embedded from Google Drive for easier maintenance
• Added visual separation between Features and Video sections

Testing Locally

1. Clone the repository
2. Navigate to the site directory:

   cd site

3. Install dependencies:

   yarn install

4. Start the development server:

   yarn start

5. Open http://localhost:3000 in your browser
6. Scroll down past the Features section to see the new Video section

Notes

The video is embedded from Google Drive. Make sure you have internet access to view it.