refactor: extract zig-physics to separate repository

- Extract quantum/ (E8, golden gates, alpha-gamma bridge) to zig-physics
- Extract gravity/ (black holes, sacred math) to zig-physics
- Extract qcd/, dark_matter/, particle_physics/ to zig-physics
- Extract plasma/, baryogenesis/, monopoles/ to zig-physics
- Extract quantum_gravity/ (E8 LQG bridge) to zig-physics

9 physics modules extracted — ready for DARPA CLARA grant!

Русский перевод описания изменений.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Dmitrii Vasilev