[s1880] Introduce new EventAI Error Log File. Update your config

You will now have an option called EventAIErrorLogFile in the config, in which you can store the name of the file for EventAI Errors.

Also there exists the config option LogFilter_EventAiDev with which the core can be tuned to be more chatty about EventAI

(based on commit [12347] - 38b3e6e)