Logger and Configuration Refactoring (#573)

* Logging: Refactor log targets into Ryujinx.Common

* Logger: Implement JSON Log Target

* Logger: Optimize Console/File logging targets

Implement a simple ObjectPool to pool up StringBuilders to avoid causing excessive GCing of gen1/2 items when large amounts of log entries are being generated.

We can also pre-determine the async overflow action at initialization time, allowing for an easy optimization in the message enqueue function, avoiding a number of comparisons.

* Logger: Implement LogFormatters

* Config: Refactor configuration file and loading

* Config: Rename to .jsonc to avoid highlighting issues in VSC and GitHub

* Resolve style nits

* Config: Resolve incorrect default key binding

* Config: Also update key binding default in schema

* Tidy up namespace imports

* Config: Update CONFIG.md to reflect new Config file

Ryujinx.Common/Logging/Formatters/DefaultLogFormatter.cs

@@ -0,0 +1,53 @@
+using System.Reflection;
+using System.Text;
+
+namespace Ryujinx.Common.Logging
+{
+    internal class DefaultLogFormatter : ILogFormatter
+    {
+        private static readonly ObjectPool<StringBuilder> _stringBuilderPool = SharedPools.Default<StringBuilder>();
+
+        public string Format(LogEventArgs args)
+        {
+            StringBuilder sb = _stringBuilderPool.Allocate();
+
+            try
+            {
+                sb.Clear();
+
+                sb.AppendFormat(@"{0:hh\:mm\:ss\.fff}", args.Time);
+                sb.Append(" | ");
+                sb.AppendFormat("{0:d4}", args.ThreadId);
+                sb.Append(' ');
+                sb.Append(args.Message);
+
+                if (args.Data != null)
+                {
+                    PropertyInfo[] props = args.Data.GetType().GetProperties();
+
+                    sb.Append(' ');
+
+                    foreach (var prop in props)
+                    {
+                        sb.Append(prop.Name);
+                        sb.Append(": ");
+                        sb.Append(prop.GetValue(args.Data));
+                        sb.Append(" - ");
+                    }
+
+                    // We remove the final '-' from the string
+                    if (props.Length > 0)
+                    {
+                        sb.Remove(sb.Length - 3, 3);
+                    }
+                }
+
+                return sb.ToString();
+            }
+            finally
+            {
+                _stringBuilderPool.Release(sb);
+            }
+        }
+    }
+}