Rewrite the C++ Demangler (#416)

* Rewrite the C++ Demangler

This new Demangler provides support to almost every possible mangled
symbols and should behaves like GNU c++filt.

It works on 98.9% of the sdk's symbols and 99.5%
of Puyo Puyo Tetris's symbols.

* Fix code style

* Fix noexcept enclosed expression parsing issues

* fix code style issues

Ryujinx.HLE/HOS/Diagnostics/Demangler/Ast/PackedTemplateParameter.cs

@@ -0,0 +1,39 @@
+using System.Collections.Generic;
+using System.IO;
+
+namespace Ryujinx.HLE.HOS.Diagnostics.Demangler.Ast
+{
+    public class PackedTemplateParameter : NodeArray
+    {
+        public PackedTemplateParameter(List<BaseNode> Nodes) : base(Nodes, NodeType.PackedTemplateParameter) { }
+
+        public override void PrintLeft(TextWriter Writer)
+        {
+            foreach (BaseNode Node in Nodes)
+            {
+                Node.PrintLeft(Writer);
+            }
+        }
+
+        public override void PrintRight(TextWriter Writer)
+        {
+            foreach (BaseNode Node in Nodes)
+            {
+                Node.PrintLeft(Writer);
+            }
+        }
+
+        public override bool HasRightPart()
+        {
+            foreach (BaseNode Node in Nodes)
+            {
+                if (Node.HasRightPart())
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+    }
+}