v0.3.0

Stable release for the tested 0.3.0 beta line.\n\nHighlights:\n- Adds the native Home Assistant light entity for Anycubic camera light control.\n- Fixes Kobra X camera-light startup behavior by using the Slicer/MQTT-confirmed command type.\n- Adds the side view camera panel with manual stream start, zoom, fullscreen, and optional per-printer HA camera mappings.\n- Adds cautious first-open auto-loading for local, USB, and cloud file-list tabs.\n- Adds local/USB file print preparation from the panel.\n- Stabilizes English entity IDs and adds the entity migration service for older localized IDs.\n- Improves Kobra X ACE/material handling and reduces known MQTT warning noise.\n- Adds release safety checks and starts CHANGELOG.md.\n\nRelease Gate: https://github.com/ljschmitt/hass-anycubic_cloud_v3/actions/runs/28494823902