feat: Add wifi-densepose-mat disaster detection module

Implements WiFi-Mat (Mass Casualty Assessment Tool) for detecting and
localizing survivors trapped in rubble, earthquakes, and natural disasters.

Architecture:
- Domain-Driven Design with bounded contexts (Detection, Localization, Alerting)
- Modular Rust crate integrating with existing wifi-densepose-* crates
- Event-driven architecture for audit trails and distributed deployments

Features:
- Breathing pattern detection from CSI amplitude variations
- Heartbeat detection using micro-Doppler analysis
- Movement classification (gross, fine, tremor, periodic)
- START protocol-compatible triage classification
- 3D position estimation via triangulation and depth estimation
- Real-time alert generation with priority escalation

Documentation:
- ADR-001: Architecture Decision Record for wifi-Mat
- DDD domain model specification

rust-port/wifi-densepose-rs/crates/wifi-densepose-mat/src/alerting/mod.rs

@@ -0,0 +1,9 @@
+//! Alerting module for emergency notifications.
+
+mod generator;
+mod dispatcher;
+mod triage_service;
+
+pub use generator::AlertGenerator;
+pub use dispatcher::{AlertDispatcher, AlertConfig};
+pub use triage_service::{TriageService, PriorityCalculator};