🎨 Palette: Add skip to main content links

[0m364]

💡 What: Added a 'Skip to main content' link at the top of all main pages.

🎯 Why: To allow keyboard-only users and screen readers to bypass repetitive navigation elements and go directly to the page content.

📸 Before/After: Visual changes only appear on keyboard focus (the link drops down from the top).

♿ Accessibility: Ensures compliance with standard accessibility practices by adding the skip link and ensuring the main container has a matching id="main-content" target.

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PR created automatically by Jules for task 11538075058100752401 started by @0m364

[google-labs-jules]

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