Replacement of LibLog with Microsoft.Extensions.Logging.Abstractions

[thompson-tomo]

Is your feature request related to a problem? Please describe.
The lib log library currently in use has been depreciated by the author and code base can be simplified by adopting the Microsoft library

Describe the solution you'd like
I would like unleash to use the logging service configured in my dotnet application via microsoft.extensions.logging.abstractions

Describe alternatives you've considered
Providing an implementation based on liblog

Additional context
Might be worthwhile to increase min framework as part of these changes to eliminate all the liblog code

[daveleek]

Thanks, this is on our radar for future improvement to the SDK