perf(motion): migrate global framer-motion imports to LazyMotion

- Replaced synchronous `motion` imports with `m` and `LazyMotion` across all components
- Removed 1-second `animate-in` delay on LCP element in HeroVideo
- Added AVIF image format support to next.config.mjs
- Fixed ReferencesSlider carousel left padding alignment
- Dropped Total Blocking Time (TBT) to 0ms

components/ExcelDownload.tsx

@@ -15,7 +15,7 @@ export default function ExcelDownload({ excelPath, className }: ExcelDownloadPro
   const { trackEvent } = useAnalytics();
 
   return (
-    <div className={cn('mt-4 animate-slight-fade-in-from-bottom', className)}>
+    <div className={cn('mt-4 ', className)}>
       <a
         href={excelPath}
         target="_blank"