styling and usability improvements

[rgarcia]

:rocket:	This description was created by Ellipsis for commit b89b6e4bb98c7d9091713234d041a4e9811a3369

Summary:

Enhanced styling and usability across dashboard and settings pages, including improved keyboard navigation, layout adjustments, and tooltip enhancements.

Key points:

• apps/next/app/dashboard/clusters/clusters.tsx: Improved keyboard navigation for clusters list, added focus mode switching, and updated cluster table layout.
• apps/next/app/dashboard/layout.tsx: Adjusted main layout to center content and improve spacing.
• apps/next/app/dashboard/settings/[[...slug]]/page.tsx: Updated settings page layout for full-width display and removed unnecessary borders.
• apps/next/app/globals.css: Minor CSS adjustments for navbar display.
• apps/next/app/layout.tsx: Simplified body and html layout classes.
• apps/next/components/SidebarNav.tsx: Added keyboard shortcuts for navigation links and improved active link indicator.
• apps/next/components/Topbar.tsx: Adjusted topbar layout to center content and improve spacing.
• apps/next/package.json: Added @rwh/keystrokes and @rwh/react-keystrokes dependencies for keyboard shortcut handling.

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Generated with :heart: by ellipsis.dev

[linear[bot]]

MET-41 dashboard styling / usability improvements

[rgarcia]

• #70 👈
• main

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