[DEBUG] Implemented NetLog logging type (#5)

Implemented a new debug log type called NetLog and added more verbose logging to the LDN service.
I'd like some feedback on what all should be logged under this category -- I'm likely going to be adding logs for sockets as well, but I want to know specifically if the logging should be more or less verbose and what would be the most helpful things to log.

![image](/attachments/70d5d467-2b57-436b-944f-7bf7a1f609af)

Reviewed-on: https://git.ryujinx.app/projects/Ryubing/pulls/5

src/Ryujinx.Common/Logging/LogLevel.cs

@@ -12,6 +12,7 @@ namespace Ryujinx.Common.Logging
         Error,
         Guest,
         AccessLog,
+        NetLog,
         Notice,
         Trace,
     }