chore(consolidation): migrate from blackroad-os-ideas and blackroad-os-research

## Summary
- Migrates roadmaps and RFCs from `blackroad-os-ideas`
- Migrates research papers from `blackroad-os-research`
- Part of Phase 1 BlackRoad OS consolidation

## Files Added
- `docs/roadmap/` - 2025 roadmaps
- `docs/rfc/` - RFC templates
- `docs/ideas/` - Idea proposals
- `docs/papers/` - Research papers (PS-SHA, SIG, finance automation)
- `docs/research/` - Research prompts

## Test plan
- [ ] Verify docs build
- [ ] After merge, archive source repos

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Alexa Louise <YOUR_REAL_EMAIL@EXAMPLE.COM>
Co-authored-by: Claude <noreply@anthropic.com>

docs/ideas/2025-11-24-ps-sha-index.md

@@ -0,0 +1,12 @@
+---
+title: Prime Spiral SHA Index
+tags: [math, crypto, viz]
+status: draft
+eta: 2026-Q2
+---
+Explore a prime spiral keyed by SHA-256 hashes, turning digest bits into polar
+coordinates that animate over time. Each block anchors an ephemeral glyph in
+the plane, letting observers watch entropy settle into emergent order. The
+experiment measures spectral drift, collision echoes, and whether human
+perception spots structure in pseudorandomness faster than statistical tests
+do.