MQTT status payload:
- Add packets_sent and packets_received (cumulative radio TX/RX totals)
to the status `stats` object, aligning with the Waev/MeshMapper schema.
Variants (variants/eastmesh_mqtt -> variants/eastmesh):
- Rename the variant folder to variants/eastmesh.
- Add the remaining *_repeater_observer_mqtt_bridge envs (2 -> 36), one
per observer board.
- Regroup envs by board (observer -> espnow -> mqtt_bridge) and add
per-vendor section banners.
Docs & release notes:
- Update folder path references in README, AGENTS, and boards docs.
- Add observer-eastmesh and observer-eastmesh-bridge-espnow 2026.6.6
release notes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
