v1.8.12

New Improvements or features

• Add new iot_bsp_wifi porting API to get auth mode
• add caps helper for pH Measurement
• Add support of network error code for user help contents
• Add esp32 example
• Add raspberry pi example
• Apply backoff algorithm when MQTT reconnecting
• Support Device Preference feature.

Enhancements or amendments

• Replace internal queue implement with internal data struct(Remove porting API)
• Refactoring iot-main core logic
  -- st_conn_start do not block until onboarding done.
• Update fanOscilationMode cap helper
• Support esp-idf v5.0