README: move Quickstart above the pitch video (dev-first hand-off from the site)

[iret77]

Context

The marketing site (byte5ai/omadia-homepage) hero is now business-led: the primary CTA is the pilot, and developers are routed to this repo through a "View on GitHub" secondary CTA. That makes this README the dev-first entry point. For the hand-off to land, a developer who arrives looking for setup should reach the install command fast.

Problem

The top of the README currently reads:

1. one-line intro
2. 🎬 The 2-minute pitch (video)
3. Prerequisites
4. ⚡ Quickstart (docker compose up -d)

A developer who came for setup instructions has to scroll past a video to get to the command. Developers looking for setup instructions do not want to watch a video first.

Change (pure reordering, no copy rewrite)

Hoist Prerequisites and ⚡ Quickstart above 🎬 The 2-minute pitch. Keep the bold one-line intro at the very top (it is the identity statement). Suggested order:

1. Header (wordmark, tagline, badges, nav links) — unchanged
2. One-line intro paragraph — unchanged
3. Prerequisites
4. ⚡ Quickstart (git clone … && docker compose up -d)
5. 🎬 The 2-minute pitch (now right after the command: read it, then watch it run)
6. 🚀 First run → Why omadia → …

The video keeps its place in the narrative, just after the command rather than before it.

Out of scope

No changes to the section contents themselves. Keep the current voice (the README is free of em-dashes and negation-reveal hooks; keep it that way).

Related

• Complements the homepage repositioning: byte5ai/omadia-homepage#41 (site = business-first, README = dev-first).
• Follows the earlier README pass (README undersells the product: core differentiators (Privacy Shield, verifier, Office compute, Conductor) are absent #369).