Clean up homepage - remove redundant sections, add quick links navigation

- Removed redundant experience, projects, and contact sections from homepage
- Added clean quick-links section with cards for CV, Speaking, Projects, Socials
- Removed unused LinkedIn feed, skills, and experience section styles
- Updated speaking page with professional icons matching homepage
- Added SVG icons to speaking CTA buttons
- Cleaner separation of content between homepage and dedicated pages

Author: NotAwar