Logging updates

[andrew-welker]

• Improve formatting: Previous iterations were not including the automatically-generated Exception property that was added by Serilog by using the methods that take an Exception as a parameter. PD Core is now using a Serilog package to handle formatting.
• Using the Serilog package allowed the removal of empty [] if the message is logged by a class that does NOT implement IKeyed
• Updated the format of the error log sink to match the console sink if running on VC-4. Otherwise, the format will NOT contain the app, or full time stamp. It will include the Key, if present, and the milliseconds of the timestamp. The rest of the data is already in the text included by the Error log.
• Added extension methods. These methods allow a class that implements IKeyed to log data by something like this.LogDebug("message template here", other, stuff, here).
• Added a Serilog enricher to automatically add the App Number/Room Name to every log event