Changes

• Add ErrorHandlerAgent migrated from LogMessageHandler
  • Error handling settings can be reused across multiple AutopilotSettings
  • Selectable log handling behavior (Add "Reporting Only")
• Obsolete error handling setting fields in AutopilotSettings
• Fix to Agents termination
  • Terminate autopilot by the Agent is no longer dependent on ErrorHandlerAgent
  • Use Exceptions instead of UnityEngine.Assertions
  • Organize exit code

Priority

I hope to your review && merge around one week.
There is no need to release it yet.

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