Add some more logging entries and support agent settings

[daxian-dbw]

PR Summary

Add some more logging entries and support agent settings

• Add a few more logging entries at the Debug level
• Add support for the agent setting, initially with 2 properties only: logging and telemetry, both are boolean values.
• By default, logging and telemetry are both true, meaning both are enabled.
• A new config file will be created if it doesn't exist, and the default values will be used.