Use built-in C# Logging abstraction instead of Serilog

[jkroll-deepgram]

Proposed changes

Enterprise customer request: Move away from Serilog and use the Microsoft-provided abstraction layer.

Context

Deepgram uses a Logger class throughout the .NET SDK. Unfortunately the Logger is using Serilog instead of relying on the built-in C# abstraction for logging in Microsoft.Extensions.Logging.Abstractions, which means that anyone using your SDK and a different logger, cannot override the formatting of the logs. This is a problem when combined with Kibana for log watching, as your plain-text logs break the JSON index.

Possible Implementation

Deepgram's code: https://github.com/deepgram/deepgram-dotnet-sdk/blob/main/Deepgram/Logger/Log.cs

Standardized way of logging in libraries in C#: https://www.nuget.org/packages/microsoft.extensions.logging.abstractions/

Other information