Facilitate OpenGL debug logging via GUI (#1373)

* Allow printing GL Debug logs with GUI options

Improve GL Debugger

Make the new option persistent

Address gdkchan's comments
- Rename enum to GraphicsDebugLevel
- Move Debugger Init to Renderer Init
- Fix formatting

* nit: newlines

Ryujinx.Common/Configuration/GraphicsDebugLevel.cs

@@ -0,0 +1,10 @@
+namespace Ryujinx.Common.Configuration
+{
+    public enum GraphicsDebugLevel
+    {
+        None,
+        Error,
+        Performance,
+        All
+    }
+}