Add ESP_LOG support in platform

[devunwired]

Update the platform logging to use the ESP_LOGx macros when MO_PLATFORM is set to MO_PLATFORM_ESPIDF.

This allows log messages from the library to be managed properly alongside other application logs when using functions from the ESP-IDF logging library like esp_log_level_set() to supress logs or esp_log_set_vprintf() to route them to a different destination.

[devunwired]

Looking into this a bit more deeply, this isn't a great drop-in replacement because ESP_LOGx assumes each call is a full "log message" and the macros in Debug.h assume they can piecemeal the log entry parts using printf semantics. Replacing them in this way generates 3 lines for every log (header, message, newline).

I also didn't previously realize that log levels were actually supported in Debug.h they just aren't reflected out to Platform.h. The best direct replacement here is esp_log_write(), but we still lose the level data.

@matth-x do you have any suggestions on the best way to modify the logging infrastructure here to cleanly insert ESP_LOGx with support for levels in the platform layer?