docs(readme): full rewrite — 15 rings, 45 specs, 27 agents [TASK-002]

[gHashTag]

README.md Full Rewrite

Closes #40

Changes

• Badges: CI, open issues, open PRs, ring count, spec count, agent count, license
• Quick Start: actual t27c CLI commands (parse, gen-zig, gen-verilog, gen-c, seal --verify)
• Architecture tree: accurate mapping of all 45 specs across 10 spec domains + 15 compiler specs
• SEED-RINGS table: rings 0–17 with layer, capability, status (15 sealed, 1 open, 2 planned)
• GoldenFloat table: all 7 formats with exp/mant/φ-distance
• Sacred constants: proper .t27 syntax
• 27-agent system: overview table with domains and key files
• 8 Constitutional Laws: summary table with one-line rules
• PHI LOOP: full 9-step workflow
• Contributing guide: LAW 4 compliant (issue → branch → spec edit → PR)
• Documentation index: organized by governance / architecture / agents

What was wrong with old README

• Said 'TRI-27 Assembly' — t27 is a spec-first language, not just assembly
• Example code showed raw assembly MOV/JMP — not how t27 actually works
• Architecture tree was incomplete (missing .trinity/, tests/, stage0/)
• No mention of 27-agent system
• No SEED-RINGS progress
• No contributing guide
• No badges
• Said '55 PHI LOOP skills' — outdated

φ² + 1/φ² = 3 | TRINITY