Summary: GitHub pivots homepage to focus on Copilot

Why It Matters: The main landing page now highlights AI coding tools instead of general platform features. This shows a major shift in how they want to be seen by new users.

What Changed:

• The page title changed from a general brand message to "GitHub Copilot · Your AI pair programmer."
• Most of the homepage content about security, collaboration, and project management was removed.
• The main "Skip to content" link now goes directly to the Copilot features page.
• Language selection links now point to the Copilot section instead of the main root domain.