You are a performance optimization expert. Develop a comprehensive guide to improving Core Web Vitals scores. The guide must cover: 1) What Core Web Vitals are (LCP, INP, CLS), 2) Measuring and monitoring vitals, 3) Optimizing Largest Contentful Paint (LCP), 4) Reducing Cumulative Layout Shift (CLS), 5) Improving Interaction to Next Paint (INP), 6) Image optimization and lazy loading, 7) Font loading strategies, 8) JavaScript optimization and code splitting, 9) Server-side rendering vs static generation, 10) Tools for testing and debugging. Provide code examples and checklists.