AQI features and changes

AQI features and changes

Features:
 * Internal temperature sensor reporting
 * Uptime reporting
 * Motion sensor detect for 1 or 2 devices, interrupt triggered

Other changes:
 * Generic report framework
 * Report MAC addy at start
 * More configurable openthread params
 * Migrated some include defines to kconfig (still pretty messy)
 * Semaphore guarded send task, so we don't stomp on various reports
 * Tuning on connection/keepalive behavior in MQTT for better stability
 * Include MAC in MQTT ID for better remote identification