TESTERS WANTED: RyuLDN implementation (#65)

These changes allow players to matchmake for local wireless using a LDN
server. The network implementation originates from Berry's public TCP
RyuLDN fork. Logo and unrelated changes have been removed.

Additionally displays LDN game status in the game selection window when
RyuLDN is enabled.

Functionality is only enabled while network mode is set to "RyuLDN" in
the settings.

src/Ryujinx.UI.Common/App/LdnGameData.cs

@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+
+namespace Ryujinx.UI.App.Common
+{
+    public struct LdnGameData
+    {
+        public string Id { get; set; }
+        public int PlayerCount { get; set; }
+        public int MaxPlayerCount { get; set; }
+        public string GameName { get; set; }
+        public string TitleId { get; set; }
+        public string Mode { get; set; }
+        public string Status { get; set; }
+        public IEnumerable<string> Players { get; set; }
+    }
+}