feat: implement native ARM64 Docker builds with CDN support (#791)

* feat: implement native ARM64 Docker builds with CDN support

- Replace QEMU emulation with native ARM64/AMD64 runners (linux-arm64-8-core, linux-x64-8-core)
- Fix manifest creation with proper error handling and image existence checks
- Add CDN video support with getVideoUrl function and Video component
- Update all docs MDX files to use Video component instead of raw video tags
- Update GitHub Actions workflow to use architecture-specific builds
- Remove QEMU setup to eliminate emulation timeout issues
- Maintain multi-arch Docker image support through manifests

* Update .github/workflows/build.yml

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

---------

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

apps/docs/components/ui/video.tsx

@@ -0,0 +1,30 @@
+import { getVideoUrl } from '@/lib/utils'
+
+interface VideoProps {
+  src: string
+  className?: string
+  autoPlay?: boolean
+  loop?: boolean
+  muted?: boolean
+  playsInline?: boolean
+}
+
+export function Video({
+  src,
+  className = 'w-full -mb-2 rounded-lg',
+  autoPlay = true,
+  loop = true,
+  muted = true,
+  playsInline = true,
+}: VideoProps) {
+  return (
+    <video
+      autoPlay={autoPlay}
+      loop={loop}
+      muted={muted}
+      playsInline={playsInline}
+      className={className}
+      src={getVideoUrl(src)}
+    />
+  )
+}