[Docs] Match homepage packet motion

[DanielLeens]

Summary

• replace dashed-path animation with native SVG packets following the original eight-second timelines
• keep CDC, transform, schema, and checkpoint state changes synchronized with packet arrivals
• preserve the homepage light/dark themes, pause control, and reduced-motion behavior

Validation

• JSX parser
• LESS parser
• git diff --check

No local site build or browser run was performed, per request.

[davidzollo]

+1
LGTM