[2shepard2]

Summary

Adds CoreView Matrix targets, ESPHome Beacon firmware, local audio-reactive display support, Home Assistant-native Matrix controls, and the optional SendSpin visualizer adapter.

Highlights

• Matrix target registration, retained MQTT scene protocol, themes, effects, tickers, and target status/ack handling.
• ESPHome HUB75 Beacon reference package with local microphone visualizer and HA controls.
• Optional SendSpin adapter plus CoreView visualizer UI/runtime integration.
• Documentation and safety-focused public ESPHome examples.

Validation

• Node syntax and whitespace checks passed for CoreView changes.
• ESPHome config validation passed in the Home Assistant ESPHome add-on.
• Production CoreView and live Beacon behavior were validated in the lab.