docs(research): Add Pointer Architecture ↔ Trinity S³AI companion document (#499)

Research bridge document mapping Savenko's Pointer Architecture theory to Trinity S³AI framework:
- 8 sections: Theory, Literature Map, Formula Bridge, CLI commands, File reference, Research queries, Open questions, Quick reference
- Maps dark matter → VSA bundle, gravity → φ-gradient, black holes → S/A sacred formula, consciousness → Temporal Trinity
- 75+ formula fits with error analysis
- Pre-built research queries for Perplexity/Scholar

Author: Antigravity Agent