Migrate Livepeer Cascade blog post to new site

[rickstaa]

Context

As part of the blog.livepeer.org → livepeer.org/blog migration, this post needs to be ported to the new site.

Old URL: https://blog.livepeer.org/introducing-livepeer-cascade-a-vision-for-livepeers-future-in-the-age-of-real-time-ai-video/
Expected new URL: /blog/introducing-livepeer-cascade-a-vision-for-livepeers-future-in-the-age-of-real-time-ai-video

What needs to happen

• Create markdown file in content/blog/ with frontmatter (title, description, date, category, tags, image)
• Port the full post content from Ghost
• Create header SVG image in public/images/blog/
• Verify redirect works (already added in chore: add blog.livepeer.org post slug redirects #36)

Post details

• Title: Introducing Livepeer Cascade - A Vision For Livepeer's Future in the Age of Real-Time AI Video
• Date: November 1, 2024
• Reading time: 12 min (longest post on old blog)
• Significance: Foundational vision post that defines the Cascade thesis — referenced by multiple other posts

Notes

The redirect from the old slug is already set up in #36. Once the markdown file is added, the post will be live.